裝修計算器開發源碼

『壹』 簡單計算器的源代碼

package calculator;

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JTextField;
import java.awt.Rectangle;
import javax.swing.JButton;
import javax.swing.BorderFactory;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.SystemColor;
import java.awt.Color;

/**
* <p>Title:</p>
*
* <p>Description: 這個類用來實現一個簡單的計算器</p>
*
* <p>Copyright: Copyright (c) 2006年</p>
*
* <p>Company: </p>
*
* @author
* @version 1.0
*/
public class CalculatorFrame extends JFrame {

boolean flag = false;
String operand1;
String operand2;
double result;
String action;

BorderLayout borderLayout1 = new BorderLayout();
JTextField txtresult = new JTextField();
JButton btn1 = new JButton();
JButton btn2 = new JButton();
JButton btn3 = new JButton();
JButton btn4 = new JButton();
JButton btn5 = new JButton();
JButton btn6 = new JButton();
JButton btn7 = new JButton();
JButton btn8 = new JButton();
JButton btn9 = new JButton();
JButton btn0 = new JButton();
JButton btnplus = new JButton();
JButton btnminus = new JButton();
JButton btnjultiply = new JButton();
JButton btndivide = new JButton();
JButton btnclear = new JButton();
JButton btnequal = new JButton();

public CalculatorFrame() {
try {
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}

private void jbInit() throws Exception {
getContentPane().setLayout(null);
txtresult.setBackground(SystemColor.WHITE);
txtresult.setBorder(BorderFactory.createLoweredBevelBorder());
txtresult.setDisabledTextColor(Color.black);
txtresult.setEditable(false);
txtresult.setHorizontalAlignment(JTextField.RIGHT);
txtresult.setBounds(new Rectangle(50, 50, 305, 25));
btn1.setBounds(new Rectangle(50, 200, 65, 30));
btn1.setBorder(BorderFactory.createRaisedBevelBorder());
btn1.setText("1");
btn1.addActionListener(new CalculatorFrame_btn1_actionAdapter(this));
btn2.setBounds(new Rectangle(130, 200, 65, 30));
btn2.setBorder(BorderFactory.createRaisedBevelBorder());
btn2.setText("2");
btn2.addActionListener(new CalculatorFrame_btn2_actionAdapter(this));
btn3.setBounds(new Rectangle(210, 200, 65, 30));
btn3.setBorder(BorderFactory.createRaisedBevelBorder());
btn3.setText("3");
btn3.addActionListener(new CalculatorFrame_btn3_actionAdapter(this));
btn4.setBounds(new Rectangle(50, 150, 65, 30));
btn4.setBorder(BorderFactory.createRaisedBevelBorder());
btn4.setText("4");
btn4.addActionListener(new CalculatorFrame_btn4_actionAdapter(this));
btn5.setBounds(new Rectangle(130, 150, 65, 30));
btn5.setBorder(BorderFactory.createRaisedBevelBorder());
btn5.setText("5");
btn5.addActionListener(new CalculatorFrame_btn5_actionAdapter(this));
btn6.setBounds(new Rectangle(210, 150, 65, 30));
btn6.setBorder(BorderFactory.createRaisedBevelBorder());
btn6.setText("6");
btn6.addActionListener(new CalculatorFrame_btn6_actionAdapter(this));
btn7.setBounds(new Rectangle(50, 100, 65, 30));
btn7.setBorder(BorderFactory.createRaisedBevelBorder());
btn7.setText("7");
btn7.addActionListener(new CalculatorFrame_btn7_actionAdapter(this));
btn8.setBounds(new Rectangle(130, 100, 65, 30));
btn8.setBorder(BorderFactory.createRaisedBevelBorder());
btn8.setText("8");
btn8.addActionListener(new CalculatorFrame_btn8_actionAdapter(this));
btn9.setBounds(new Rectangle(210, 100, 65, 30));
btn9.setBorder(BorderFactory.createRaisedBevelBorder());
btn9.setText("9");
btn9.addActionListener(new CalculatorFrame_btn9_actionAdapter(this));
btn0.setBounds(new Rectangle(50, 250, 65, 30));
btn0.setBorder(BorderFactory.createRaisedBevelBorder());
btn0.setText("0");
btn0.addActionListener(new CalculatorFrame_btn0_actionAdapter(this));
btnplus.setBounds(new Rectangle(290, 250, 65, 30));
btnplus.setBorder(BorderFactory.createRaisedBevelBorder());
btnplus.setText("+");
btnplus.addActionListener(new CalculatorFrame_btnplus_actionAdapter(this));
btnminus.setBounds(new Rectangle(290, 200, 65, 30));
btnminus.setBorder(BorderFactory.createRaisedBevelBorder());
btnminus.setText("-");
btnminus.addActionListener(new CalculatorFrame_btnminus_actionAdapter(this));
btnjultiply.setBounds(new Rectangle(290, 150, 65, 30));
btnjultiply.setBorder(BorderFactory.createRaisedBevelBorder());
btnjultiply.setText("*");
btnjultiply.addActionListener(new
CalculatorFrame_btnjultiply_actionAdapter(this));
btndivide.setBounds(new Rectangle(290, 100, 65, 30));
btndivide.setBorder(BorderFactory.createRaisedBevelBorder());
btndivide.setText("/");
btndivide.addActionListener(new CalculatorFrame_btndivide_actionAdapter(this));
btnclear.setBounds(new Rectangle(130, 250, 65, 30));
btnclear.setBorder(BorderFactory.createRaisedBevelBorder());
btnclear.setText("C");
btnclear.addActionListener(new CalculatorFrame_btnclear_actionAdapter(this));
btnequal.setBounds(new Rectangle(210, 250, 65, 30));
btnequal.setBorder(BorderFactory.createRaisedBevelBorder());
btnequal.setText("=");
btnequal.addActionListener(new CalculatorFrame_btnequal_actionAdapter(this));
this.getContentPane().setBackground(UIManager.getColor(
"MenuItem.background"));
this.setTitle("計算器");
this.getContentPane().add(txtresult);
this.getContentPane().add(btn1);
this.getContentPane().add(btn0);
this.getContentPane().add(btnclear);
this.getContentPane().add(btnplus);
this.getContentPane().add(btnequal);
this.getContentPane().add(btn2);
this.getContentPane().add(btn3);
this.getContentPane().add(btnminus);
this.getContentPane().add(btn4);
this.getContentPane().add(btn7);
this.getContentPane().add(btn5);
this.getContentPane().add(btn6);
this.getContentPane().add(btnjultiply);
this.getContentPane().add(btndivide);
this.getContentPane().add(btn9);
this.getContentPane().add(btn8);
}

public void btnplus_actionPerformed(ActionEvent e) {
action = "plus";
operand1 = txtresult.getText();
txtresult.setText("");
flag = true;
}

public void btnminus_actionPerformed(ActionEvent e) {
action = "minus";
operand1 = txtresult.getText();
txtresult.setText("");
flag = true;
}

public void btnjultiply_actionPerformed(ActionEvent e) {
action = "multiply";
operand1 = txtresult.getText();
txtresult.setText("");
flag = true;
}

public void btndivide_actionPerformed(ActionEvent e) {
action = "divide";
operand1 = txtresult.getText();
txtresult.setText("");
flag = true;
}

public void btnclear_actionPerformed(ActionEvent e) {
txtresult.setText("");
}

public void btn1_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn1.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn1.getActionCommand());
}

}

public void btn2_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn2.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn2.getActionCommand());
}

}

public void btn3_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn3.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn3.getActionCommand());
}

}

public void btn4_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn4.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn4.getActionCommand());
}

}

public void btn5_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn5.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn5.getActionCommand());
}

}

public void btn6_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn6.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn6.getActionCommand());
}

}

public void btn7_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn7.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn7.getActionCommand());
}

}

public void btn8_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn8.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn8.getActionCommand());
}

}

public void btn9_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn9.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn9.getActionCommand());
}

}

public void btn0_actionPerformed(ActionEvent e) {
if (flag) {
txtresult.setText(btn0.getActionCommand());
flag=false;
} else {
txtresult.setText(txtresult.getText() + btn0.getActionCommand());
}

}

public void btnequal_actionPerformed(ActionEvent e) {
double digit1, digit2;
operand2 = txtresult.getText();
if (flag == false) {
if (action.equals("plus")) {
digit1 = Double.parseDouble(operand1);
digit2 = Double.parseDouble(operand2);
result = digit1 + digit2;
txtresult.setText(String.valueOf((int) result));
flag = true;
} else if (action.equals("minus")) {
digit1 = Double.parseDouble(operand1);
digit2 = Double.parseDouble(operand2);
result = digit1 - digit2;
txtresult.setText(String.valueOf((int) result));
flag = true;
} else if (action.equals("multiply")) {
digit1 = Double.parseDouble(operand1);
digit2 = Double.parseDouble(operand2);
result = digit1 * digit2;
txtresult.setText(String.valueOf((int) result));
flag = true;
} else if (action.equals("divide")) {
digit1 = Double.parseDouble(operand1);
digit2 = Double.parseDouble(operand2);
result = digit1 / digit2;
if (digit2==0) {
txtresult.setText("ERROR");
flag=true;
} else {
txtresult.setText(String.valueOf((int) result));
flag = true;
}
}

}

}

class CalculatorFrame_btnequal_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btnequal_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btnequal_actionPerformed(e);
}
}

class CalculatorFrame_btn0_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn0_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn0_actionPerformed(e);
}
}

class CalculatorFrame_btn9_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn9_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn9_actionPerformed(e);
}
}

class CalculatorFrame_btn8_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn8_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn8_actionPerformed(e);
}
}

class CalculatorFrame_btn7_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn7_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn7_actionPerformed(e);
}
}

class CalculatorFrame_btn6_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn6_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn6_actionPerformed(e);
}
}

class CalculatorFrame_btn5_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn5_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn5_actionPerformed(e);
}
}

class CalculatorFrame_btn4_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn4_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn4_actionPerformed(e);
}
}

class CalculatorFrame_btn2_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn2_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn2_actionPerformed(e);
}
}

class CalculatorFrame_btn3_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn3_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn3_actionPerformed(e);
}
}

class CalculatorFrame_btnclear_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btnclear_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btnclear_actionPerformed(e);
}
}

class CalculatorFrame_btndivide_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btndivide_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btndivide_actionPerformed(e);
}
}

class CalculatorFrame_btnjultiply_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btnjultiply_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btnjultiply_actionPerformed(e);
}
}

class CalculatorFrame_btnminus_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btnminus_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btnminus_actionPerformed(e);
}
}

class CalculatorFrame_btnplus_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btnplus_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btnplus_actionPerformed(e);
}
}

class CalculatorFrame_btn1_actionAdapter implements ActionListener {
private CalculatorFrame adaptee;
CalculatorFrame_btn1_actionAdapter(CalculatorFrame adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn1_actionPerformed(e);
}
}
}

public class Calculator {

public static void main(String[] args) {

CalculatorFrame Objcal=new CalculatorFrame();

Objcal.setSize(410,320);
Objcal.setVisible(true);
}
}

『貳』 開發一個簡易的計算器APP程序 android源代碼

下面是效果展示：

復制代碼代碼如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="s/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/tvResult"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:height="50dp"
android:text="@string/tvResult"
/>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/btnBackspace"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="150dp"
android:layout_marginLeft="10dp"
android:text="@string/btnbackspace"/>
<Button
android:id="@+id/btnCE"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="150dp"
android:text="@string/btnCE"/>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/btn7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:width="75dp"
android:text="@string/btn7"/>
<Button
android:id="@+id/btn8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btn8"/>
<Button
android:id="@+id/btn9"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btn9"/>
<Button
android:id="@+id/btnDiv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btnDiv"/>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/btn4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:width="75dp"
android:text="@string/btn4"/>
<Button
android:id="@+id/btn5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btn5"/>
<Button
android:id="@+id/btn6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btn6"/>
<Button
android:id="@+id/btnMul"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btnMul"/>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:width="75dp"
android:text="@string/btn1"/>
<Button
android:id="@+id/btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btn2"/>
<Button
android:id="@+id/btn3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btn3"/>
<Button
android:id="@+id/btnAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btnAdd"/>
</LinearLayout>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/btn0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:width="75dp"
android:text="@string/btn0"/>
<Button
android:id="@+id/btnC"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btnC"/>
<Button
android:id="@+id/btnEqu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btnEqu"/>
<Button
android:id="@+id/btnSub"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:width="75dp"
android:text="@string/btnSub"/>
</LinearLayout>
</LinearLayout>

復制代碼代碼如下:

package com.example.week2;

import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;

public class MainActivity extends Activity implements OnClickListener{

//聲明一些控制項
Button btn0=null;
Button btn1=null;
Button btn2=null;
Button btn3=null;
Button btn4=null;
Button btn5=null;
Button btn6=null;
Button btn7=null;
Button btn8=null;
Button btn9=null;
Button btnBackspace=null;
Button btnCE=null;
Button btnC=null;
Button btnAdd=null;
Button btnSub=null;
Button btnMul=null;
Button btnDiv=null;
Button btnEqu=null;
TextView tvResult=null;
//聲明兩個參數。接收tvResult前後的值
double num1=0,num2=0;
double Result=0;//計算結果
int op=0;//判斷操作數，
boolean isClickEqu=false;//判斷是否按了「=」按鈕

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//從布局文件中獲取控制項，
btn0=(Button)findViewById(R.id.btn0);
btn1=(Button)findViewById(R.id.btn1);
btn2=(Button)findViewById(R.id.btn2);
btn3=(Button)findViewById(R.id.btn3);
btn4=(Button)findViewById(R.id.btn4);
btn5=(Button)findViewById(R.id.btn5);
btn6=(Button)findViewById(R.id.btn6);
btn7=(Button)findViewById(R.id.btn7);
btn8=(Button)findViewById(R.id.btn8);
btn9=(Button)findViewById(R.id.btn9);
btnBackspace=(Button)findViewById(R.id.btnBackspace);
btnCE=(Button)findViewById(R.id.btnCE);
btnC=(Button)findViewById(R.id.btnC);
btnEqu=(Button)findViewById(R.id.btnEqu);
btnAdd=(Button)findViewById(R.id.btnAdd);
btnSub=(Button)findViewById(R.id.btnSub);
btnMul=(Button)findViewById(R.id.btnMul);
btnDiv=(Button)findViewById(R.id.btnDiv);
tvResult=(TextView)findViewById(R.id.tvResult);

//添加監聽
btnBackspace.setOnClickListener(this);
btnCE.setOnClickListener(this);

btn0.setOnClickListener(this);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
btn3.setOnClickListener(this);
btn4.setOnClickListener(this);
btn5.setOnClickListener(this);
btn6.setOnClickListener(this);
btn7.setOnClickListener(this);
btn8.setOnClickListener(this);
btn9.setOnClickListener(this);


btnAdd.setOnClickListener(this);
btnSub.setOnClickListener(this);
btnMul.setOnClickListener(this);
btnDiv.setOnClickListener(this);
btnEqu.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
//btnBackspace和CE--------------------
case R.id.btnBackspace:
String myStr=tvResult.getText().toString();
try {
tvResult.setText(myStr.substring(0, myStr.length()-1));
} catch (Exception e) {
tvResult.setText("");
}

break;
case R.id.btnCE:
tvResult.setText(null);
break;

//btn0--9---------------------------
case R.id.btn0:
if(isClickEqu)
{
tvResult.setText(null);
isClickEqu=false;
}
String myString=tvResult.getText().toString();
myString+="0";
tvResult.setText(myString);
break;
case R.id.btn1:
if(isClickEqu)
{
tvResult.setText(null);
isClickEqu=false;
}
String myString1=tvResult.getText().toString();
myString1+="1";
tvResult.setText(myString1);
break;
case R.id.btn2:
if(isClickEqu)
{
tvResult.setText(null);
isClickEqu=false;
}
String myString2=tvResult.getText().toString();
myString2+="2";
tvResult.setText(myString2);
break;
case R.id.btn3:
if(isClickEqu)
{
tvResult.setText(null);
isClickEqu=false;
}
String myString3=tvResult.getText().toString();
myString3+="3";
tvResult.setText(myString3);
break;
cas

『叄』 C#計算器源代碼

namespace jisuanji
{
public partial class jisuanqi : Form
{
public jisuanqi()
{
InitializeComponent();
}

private void jisuanqi_Load(object sender, EventArgs e)
{
txtMath.Text = "0.0";
}

//存放輸入的數字

private string str1 = "";

//存放第二個數字

private string str2 = "";

//存放執行的什麼操作 如：+，-，*，/

private string action = "";

//判斷是否點擊了「=」，默認是沒有點擊

private bool Equal_flag = false;

private void check(Button btnname)
{
if (action.Equals(""))
{
if (txtMath.Text != "0" || txtMath.Text != "0.0")
{
str1 += btnname.Text;
txtMath.Text = str1.ToString();
}
//如果是第一次輸入數字
if (txtMath.Text.Equals("0.0") || txtMath.Text.Equals("0"))
{
txtMath.Text = btnname.Text;
str1 = btnname.Text.ToString();
}
}

//如果已經輸入了數字且沒有點擊「=」
if(!action.Equals("") && txtMath.Text.Length != 0 && (!txtMath.Text.Equals("0.0")) && (!txtMath.Text.Equals("0")))
{
str2 += btnname.Text;
txtMath.Text += btnname.Text;

}

//如果已經輸入了數字並執行了加減乘除的操作，第二個數字輸入時
else if ((!action.Equals("")) && txtMath.Text.Length != 0 && !txtMath.Text.Equals(0.0) && (!txtMath.Text.Equals("0")))
{
txtMath.Text += btnname.Text;
//str2 = txtMath.Text.ToString();
str2 += btnname.Text;

}
else if (txtMath.Text.Equals("") && (!action.Equals("")))
{
txtMath.Text += btnname.Text;
str2 = txtMath.Text;

}
}

private void btnZero_Click(object sender, EventArgs e)
{
if (Equal_flag)
{

//如果沒有點擊「+-*/」
if (action.Equals(""))
{
if (str1.Equals(""))
{
MessageBox.Show("您的操作有誤", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
}
check(btnZero);
}
else
{
check(btnZero);
Equal_flag = false;
}
}

private void btnDot_Click(object sender, EventArgs e)
{
//點擊過等號
if (Equal_flag)
{
//第二個數字沒有輸入的時候
if (str2.Equals(""))
{
//第一個數字已經有點號存在
if (str1.IndexOf('.') > -1)
{
MessageBox.Show("您的操作有誤", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
txtMath.Text = str1;
return;
}
check(btnDot);
}
//第二個數字輸入了的時候
else
{
//第二個數字中不存在點號的時候
if (!(str2.IndexOf('.') > -1))
{
check(btnDot);
return;
}
//第二個數字中存在點號的時候
MessageBox.Show("您的操作有誤", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
//沒有點擊過等號
else
{
//第一個數字存在點號
if (str1.IndexOf('.') > -1)
{
MessageBox.Show("您的操作有誤", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
txtMath.Text = str1;
return;
}
//第一個數字不存在點號的時候
else
{
//如果第一個數字還是空的時候
if (!str1.Equals(""))
{
check(btnDot);
//Equal_flag = false;
return;
}
txtMath.Text = "0" + btnDot.Text;
str1 = txtMath.Text;
}
}
}

private void btnOne_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnOne);
}
else
{
check(btnOne);
Equal_flag = false;
}
}

private void btnTwo_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnTwo);
}
else
{
check(btnTwo);
Equal_flag = false;
}
}

private void btnthree_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnthree);
}
else
{
check(btnthree);
Equal_flag = false;
}
}

private void btnFour_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
check(btnFour);
}
else
{
check(btnFour);
Equal_flag = false;
}
}

private void btnFive_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnFive);
}
else
{
check(btnFive);
Equal_flag = false;
}
}

private void btnSix_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnSix);
}
else
{
check(btnSix);
Equal_flag = false;
}
}

private void btnSeven_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnSeven);
}
else
{
check(btnSeven);
Equal_flag = false;
}
}

private void btnEight_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnEight);
}
else
{
check(btnEight);
Equal_flag = false;
}
}

private void btnNine_Click(object sender, EventArgs e)
{
if (Equal_flag)
{
if (!str1.Equals(""))
{
if (action.Equals(""))
{
MessageBox.Show("請選擇運算符", "信息提示");
return;
}
}
check(btnNine);
}
else
{
check(btnNine);
Equal_flag = false;
}
}
private void btnQual_Click(object sender, EventArgs e)
{
str_check(btnQual);
str2 = "";
Equal_flag = true;
action = "";

}

private string calcute(string str1, string str2, string action)
{
switch (action)
{
case "+":
str1 = (double.Parse(str1) + double.Parse(str2)).ToString();
return str1;
case "-":
str1 = (double.Parse(str1) - double.Parse(str2)).ToString();
return str1;
case "*":
str1 = (double.Parse(str1) * double.Parse(str2)).ToString();
return str1;
case "/":
if (str2.Equals("0.0") || str2.Equals("0"))
{
MessageBox.Show("被除數不能為0", "警告");
return str1;
}
str1 = (double.Parse(str1) / double.Parse(str2)).ToString();
return str1;
default :
MessageBox.Show("操作錯誤！", "提示");
return "wrong";
}
}

private void str_check(Button btnname)
{
//完成上一次計算後點擊運算按鈕應將結果作為第一個數
if (Equal_flag)
{
//第二個數還沒輸入的時候
if ((!str1.Equals("")) && (str2.Equals("")))
{
if (!(btnname.Text.IndexOf('=') > -1))
{
action = btnname.Text;
txtMath.Text += btnname.Text;
}
}
//兩個都不為空，第二個數已經輸入，應將他們進行運算
if ((!str1.Equals("")) && (!str2.Equals("")))
{
str1 = calcute(str1, str2, action);
txtMath.Text = str1.ToString();
}
//直接點擊操作錯誤
else if (str1.Equals(""))
{
MessageBox.Show("請輸入要進行運算的數字", "信息提示");
}
}

//沒有點擊「=」
else if (!Equal_flag)
{

//第二個數還沒輸入的時候
if ((!str1.Equals("")) && (str2.Equals("")))
{
if (!(btnname.Text.IndexOf('=') > -1))
{
action = btnname.Text;
txtMath.Text += btnname.Text;
}
}
//兩個都不為空，第二個數已經輸入，應將他們進行運算
if ((!str1.Equals("")) && (!str2.Equals("")))
{
str1 = calcute(str1, str2, action);
txtMath.Text = str1.ToString();
}
//直接點擊操作錯誤
else if (str1.Equals(""))
{
MessageBox.Show("請輸入要進行運算的數字", "信息提示");
}
}
}

private void btnPlus_Click(object sender, EventArgs e)
{
str_check(btnPlus);
}

private void btnMinus_Click(object sender, EventArgs e)
{
str_check(btnMinus);
}

private void btnTimes_Click(object sender, EventArgs e)
{
str_check(btnTimes);
}

private void btnDivide_Click(object sender, EventArgs e)
{
str_check(btnDivide);
}

private void btnRest_Click(object sender, EventArgs e)
{
txtMath.Text = "0.0";
str1 = str2 = "";
action = "";
Equal_flag = false;
}
}
}

『肆』 C#計算器源代碼

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;namespace windshadow14
{

public partial class MainForm
{

int i =0;
int a ;
int b;
int i1;
long c;

public static void Main(string[] args)
{
Application.EnableVisualStyles();
Application.(false);
Application.Run(new MainForm());
}

public MainForm()
{

InitializeComponent();

}

void Button10Click(object sender, System.EventArgs e)
{

if(textBox1.Text ==" ")
{
textBox1.Text =textBox1.Text+"0";
}

}

void Button1Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"1";
if(textBox1.Text==" ")
{
textBox1.Text =textBox1.Text+"1";
}

}

void Button2Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"2";
if(textBox1.Text==" ")
{
textBox1.Text =textBox1.Text+"2";
}
}

void Button3Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"3";
if(textBox1.Text ==" ")
{
textBox1.Text =textBox1.Text+"3";
}
}

void Button4Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"4";
if(textBox1.Text==" ")
{
textBox1.Text =textBox1.Text+"4";
}
}

void Button5Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"5";
if(textBox1.Text ==" ")
{
textBox1.Text =textBox1.Text+"5";
}
}

void Button6Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"6";
if(textBox1.Text==" ")
{
textBox1.Text =textBox1.Text+"6";
}
}

void Button7Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"7";
if(textBox1.Text ==" ")
{
textBox1.Text =textBox1.Text+"7";
}
}

void Button8Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"8";
if(textBox1.Text ==" ")
{
textBox1.Text =textBox1.Text+"8";
}
}

void Button9Click(object sender, System.EventArgs e)
{
textBox1.Text =textBox1.Text+"9";
if(textBox1.Text ==" ")
{
textBox1.Text =textBox1.Text+"9";
}
}

void TextBox1TextChanged(object sender, System.EventArgs e)
{
if(i==1||i==2||i==3||i==4)
{
textBox1.Text =" ";

}

i=0;

}

void Button12Click(object sender, System.EventArgs e)
{
i=1;
a =int .Parse (textBox1.Text);
i1=1;

}

void Button16Click(object sender, System.EventArgs e)
{

b=int.Parse (textBox1.Text );
textBox1.Text =" ";
switch(i1)
{
case 1:
c =a +b ;
break ;
case 2:
c =a -b ;
break;

case 3:
c =a *b ;
break;

case 4:
c =a /b ;
break;

}

textBox1.Text =c.ToString ();

i=0;
a=0;
b=0;
i1=0;

}

void Button13Click(object sender, System.EventArgs e)
{
i1=2;
i=1;

a =int .Parse (textBox1.Text);
}

void MainFormLoad(object sender, System.EventArgs e)
{

}

void Button14Click(object sender, System.EventArgs e)
{
i1=3;
i=3;

a =int .Parse (textBox1.Text);
}

void Button15Click(object sender, System.EventArgs e)
{
i1=4;
i=4;

a =int .Parse (textBox1.Text);
}
}
}
還可以這樣編 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace windshadow
{
public partial class Form1 : Form
{
int a;
int b;
int c;
int b1;
public Form1()
{
InitializeComponent();
}private void button1_Click(object sender, EventArgs e)
{

textBox1.Text = textBox1.Text + "1";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "1";
b = 0;}}private void button2_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "2";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "2";
b = 0;}
}private void button3_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "3";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "3";
b = 0;}
}private void button4_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "4";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "4";
b = 0;}
}private void button5_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "5";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "5";
b = 0;}
}private void button6_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "6";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "6";
b = 0;}
}private void button7_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "7";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "7";
b = 0;}
}private void button8_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "8";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "8";
b = 0;}
}private void button9_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "9";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "9";
b = 0;}
}private void button11_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + "0";
if (b == 1)
{
textBox1.Text = "";textBox1.Text = textBox1.Text + "0";
b = 0;}
}private void button10_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text + ".";
}private void button13_Click(object sender, EventArgs e)
{
a = int.Parse (textBox1.Text);

b = 1;
b1 = 1;
}private void button17_Click(object sender, EventArgs e)
{
long d;
switch (b1)
{
case 1:c = int.Parse(textBox1.Text);
d = a + c;
textBox1.Text = "";
textBox1.Text = d.ToString();
break;
case 2:
c = int.Parse(textBox1.Text);
d = a - c;
textBox1.Text = "";
textBox1.Text = d.ToString();
break;
case 3:
c = int.Parse(textBox1.Text);
d = a * c;
textBox1.Text = "";
textBox1.Text = d.ToString();
break;
case 4:
c = int.Parse(textBox1.Text);
d = a / c;
textBox1.Text = "";
textBox1.Text = d.ToString();
break;
}
}private void button14_Click(object sender, EventArgs e)
{
a = int.Parse(textBox1.Text);b = 1;
b1 = 2;
}private void button15_Click(object sender, EventArgs e)
{
a = int.Parse(textBox1.Text);b = 1;
b1 = 3;
}private void button16_Click(object sender, EventArgs e)
{
a = int.Parse(textBox1.Text);b = 1;
b1 = 4;
}private void button12_Click(object sender, EventArgs e)
{
textBox1.Text = "";
b = 0;
b1 = 0;
a = 0;
c = 0;
}private void textBox1_TextChanged(object sender, EventArgs e)
{
}
}
}這是退格鍵void Button1Click(object sender, System.EventArgs e)
{
try
{
int a =int .Parse (textBox1.Text);
a =a/10;
textBox1.Text =a.ToString ();
}
catch
{
double a =double.Parse (textBox1.Text );

int b = (int)a;
textBox1.Text =a.ToString ();

int zz =textBox1.Text.Length ;

int t = zz-1;

textBox1.Text=textBox1.Text.Remove(t);

}

}

『伍』 求一個C#計算器源代碼。

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace jisuan
{
/// <summary>
/// Form1 的摘要說明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.ComboBox comboBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
/// <summary>
/// 必需的設計器變數。
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Windows 窗體設計器支持所必需的
//
InitializeComponent();

//
// TODO: 在 InitializeComponent 調用後添加任何構造函數代碼
//
}

/// <summary>
/// 清理所有正在使用的資源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows 窗體設計器生成的代碼
/// <summary>
/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
/// 此方法的內容。
/// </summary>
private void InitializeComponent()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(24, 72);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(100, 21);
this.textBox1.TabIndex = 0;
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(312, 72);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(100, 21);
this.textBox2.TabIndex = 1;
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(448, 72);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(88, 21);
this.textBox3.TabIndex = 2;
//
// comboBox1
//
this.comboBox1.Items.AddRange(new object[] {
"+",
"-",
"*",
"/"});
this.comboBox1.Location = new System.Drawing.Point(152, 72);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(121, 20);
this.comboBox1.TabIndex = 3;
this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
//
// button1
//
this.button1.Location = new System.Drawing.Point(64, 184);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(104, 32);
this.button1.TabIndex = 4;
this.button1.Text = "計算";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(216, 192);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 23);
this.button2.TabIndex = 5;
this.button2.Text = "清除";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(376, 192);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(75, 23);
this.button3.TabIndex = 6;
this.button3.Text = "退出";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(656, 366);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.comboBox1);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();

}
#endregion

/// <summary>
/// 應用程序的主入口點。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
public double jia(double a,double b)
{
return a+b;
}
public double jian(double a,double b)
{
return a-b;
}
public double cheng(double a,double b)
{
return a*b;
}
public double chu(double a,double b)
{
return a/b;
}

private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e)
{

}

private void textBox1_TextChanged(object sender, System.EventArgs e)
{

}

private void button1_Click(object sender, System.EventArgs e)
{
string i=this.comboBox1.SelectedItem.ToString();

switch(i)
{

case "+":this.textBox3.Text=this.jia(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();

break;

case "-":this.textBox3.Text=this.jian(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();
break;
case "*":this.textBox3.Text=this.cheng(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();
break;
case"/" :this.textBox3.Text=this.chu(double.Parse(this.textBox1.Text),double.Parse(this.textBox2.Text)).ToString();
break;
}

}

private void button2_Click(object sender, System.EventArgs e)
{
this.textBox1.Text=null;
this.textBox2.Text=null;
this.textBox3.Text = null;
}

private void button3_Click(object sender, EventArgs e)
{

//this.Hide();
Application.Exit();
//this.Close();

}
}
}

『陸』 求一份在線裝修計算器的網頁源碼，用戶輸入房間的信息後，能夠計算出裝修的大概價格。

戶型圖和建築平米以及裝修風格告訴我，我給你做個預算，估一下，誤差在8%以內

『柒』 java計算器的源代碼

import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.*;
public class Counter extends Frame
{
//聲明三個面板的布局
GridLayout gl1,gl2,gl3;
Panel p0,p1,p2,p3;
JTextField tf1;
TextField tf2;
Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26;
StringBuffer str;//顯示屏所顯示的字元串
double x,y;//x和y都是運算數
int z;//Z表示單擊了那一個運算符.0表示"+",1表示"-",2表示"*",3表示"/"
static double m;//記憶的數字
public Counter()
{
gl1=new GridLayout(1,4,10,0);//實例化三個面板的布局
gl2=new GridLayout(4,1,0,15);
gl3=new GridLayout(4,5,10,15);

tf1=new JTextField(27);//顯示屏
tf1.setHorizontalAlignment(JTextField.RIGHT);
tf1.setEnabled(false);
tf1.setText("0");
tf2=new TextField(10);//顯示記憶的索引值
tf2.setEditable(false);
//實例化所有按鈕、設置其前景色並注冊監聽器
b0=new Button("Backspace");
b0.setForeground(Color.red);
b0.addActionListener(new Bt());
b1=new Button("CE");
b1.setForeground(Color.red);
b1.addActionListener(new Bt());
b2=new Button("C");
b2.setForeground(Color.red);
b2.addActionListener(new Bt());
b3=new Button("MC");
b3.setForeground(Color.red);
b3.addActionListener(new Bt());
b4=new Button("MR");
b4.setForeground(Color.red);
b4.addActionListener(new Bt());
b5=new Button("MS");
b5.setForeground(Color.red);
b5.addActionListener(new Bt());
b6=new Button("M+");
b6.setForeground(Color.red);
b6.addActionListener(new Bt());
b7=new Button("7");
b7.setForeground(Color.blue);
b7.addActionListener(new Bt());
b8=new Button("8");
b8.setForeground(Color.blue);
b8.addActionListener(new Bt());
b9=new Button("9");
b9.setForeground(Color.blue);
b9.addActionListener(new Bt());
b10=new Button("/");
b10.setForeground(Color.red);
b10.addActionListener(new Bt());
b11=new Button("sqrt");
b11.setForeground(Color.blue);
b11.addActionListener(new Bt());
b12=new Button("4");
b12.setForeground(Color.blue);
b12.addActionListener(new Bt());
b13=new Button("5");
b13.setForeground(Color.blue);
b13.addActionListener(new Bt());
b14=new Button("6");
b14.setForeground(Color.blue);
b14.addActionListener(new Bt());
b15=new Button("*");
b15.setForeground(Color.red);
b15.addActionListener(new Bt());
b16=new Button("%");
b16.setForeground(Color.blue);
b16.addActionListener(new Bt());
b17=new Button("1");
b17.setForeground(Color.blue);
b17.addActionListener(new Bt());
b18=new Button("2");
b18.setForeground(Color.blue);
b18.addActionListener(new Bt());
b19=new Button("3");
b19.setForeground(Color.blue);
b19.addActionListener(new Bt());
b20=new Button("-");
b20.setForeground(Color.red);
b20.addActionListener(new Bt());
b21=new Button("1/X");
b21.setForeground(Color.blue);
b21.addActionListener(new Bt());
b22=new Button("0");
b22.setForeground(Color.blue);
b22.addActionListener(new Bt());
b23=new Button("+/-");
b23.setForeground(Color.blue);
b23.addActionListener(new Bt());
b24=new Button(".");
b24.setForeground(Color.blue);
b24.addActionListener(new Bt());
b25=new Button("+");
b25.setForeground(Color.red);
b25.addActionListener(new Bt());
b26=new Button("=");
b26.setForeground(Color.red);
b26.addActionListener(new Bt());

//實例化四個面板
p0=new Panel();
p1=new Panel();
p2=new Panel();
p3=new Panel();
//創建一個空字元串緩沖區
str=new StringBuffer();

//添加面板p0中的組件和設置其在框架中的位置和大小
p0.add(tf1);
p0.setBounds(10,25,300,40);
//添加面板p1中的組件和設置其在框架中的位置和大小
p1.setLayout(gl1);
p1.add(tf2);
p1.add(b0);
p1.add(b1);
p1.add(b2);
p1.setBounds(10,65,300,25);
//添加面板p2中的組件並設置其的框架中的位置和大小
p2.setLayout(gl2);
p2.add(b3);
p2.add(b4);
p2.add(b5);
p2.add(b6);
p2.setBounds(10,110,40,150);
//添加面板p3中的組件並設置其在框架中的位置和大小
p3.setLayout(gl3);//設置p3的布局
p3.add(b7);
p3.add(b8);
p3.add(b9);
p3.add(b10);
p3.add(b11);
p3.add(b12);
p3.add(b13);
p3.add(b14);
p3.add(b15);
p3.add(b16);
p3.add(b17);
p3.add(b18);
p3.add(b19);
p3.add(b20);
p3.add(b21);
p3.add(b22);
p3.add(b23);
p3.add(b24);
p3.add(b25);
p3.add(b26);
p3.setBounds(60,110,250,150);
//設置框架中的布局為空布局並添加4個面板
setLayout(null);
add(p0);
add(p1);
add(p2);
add(p3);
setResizable(false);//禁止調整框架的大小
//匿名類關閉窗口
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e1)
{
System.exit(0);
}
});
setBackground(Color.lightGray);
setBounds(100,100,320,280);
setVisible(true);

}
//構造監聽器
class Bt implements ActionListener
{
public void actionPerformed(ActionEvent e2)
{
try{

if(e2.getSource()==b1)//選擇"CE"清零
{
tf1.setText("0");//把顯示屏清零
str.setLength(0);//清空字元串緩沖區以准備接收新的輸入運算數
}
else if(e2.getSource()==b2)//選擇"C"清零
{
tf1.setText("0");//把顯示屏清零
str.setLength(0);
}
else if(e2.getSource()==b23)//單擊"+/-"選擇輸入的運算數是正數還是負數
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(""+(-x));
}
else if(e2.getSource()==b25)//單擊加號按鈕獲得x的值和z的值並清空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);//清空緩沖區以便接收新的另一個運算數
y=0d;
z=0;
}
else if(e2.getSource()==b20)//單擊減號按鈕獲得x的值和z的值並清空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=1;
}
else if(e2.getSource()==b15)//單擊乘號按鈕獲得x的值和z的值並清空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=2;
}
else if(e2.getSource()==b10)//單擊除號按鈕獲得x的值和z的值並空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=3;
}
else if(e2.getSource()==b26)//單擊等號按鈕輸出計算結果
{
str.setLength(0);
switch(z)
{
case 0 : tf1.setText(""+(x+y));break;
case 1 : tf1.setText(""+(x-y));break;
case 2 : tf1.setText(""+(x*y));break;
case 3 : tf1.setText(""+(x/y));break;
}
}
else if(e2.getSource()==b24)//單擊"."按鈕輸入小數
{
if(tf1.getText().trim().indexOf(′.′)!=-1)//判斷字元串中是否已經包含了小數點
{

}
else//如果沒數點有小
{
if(tf1.getText().trim().equals("0"))//如果初時顯示為0
{
str.setLength(0);
tf1.setText((str.append("0"+e2.getActionCommand())).toString());
}
else if(tf1.getText().trim().equals(""))//如果初時顯示為空則不做任何操作
{
}
else
{
tf1.setText(str.append(e2.getActionCommand()).toString());
}
}

y=0d;

}
else if(e2.getSource()==b11)//求平方根
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText("數字格式異常");
if(x<0)
tf1.setText("負數沒有平方根");
else
tf1.setText(""+Math.sqrt(x));
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b16)//單擊了"%"按鈕
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(""+(0.01*x));
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b21)//單擊了"1/X"按鈕
{

x=Double.parseDouble(tf1.getText().trim());
if(x==0)
{

tf1.setText("除數不能為零");
}
else
{
tf1.setText(""+(1/x));
}
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b3)//MC為清除內存
{
m=0d;
tf2.setText("");
str.setLength(0);
}
else if(e2.getSource()==b4)//MR為重新調用存儲的數據
{
if(tf2.getText().trim()!="")//有記憶數字
{
tf1.setText(""+m);
}
}
else if(e2.getSource()==b5)//MS為存儲顯示的數據
{

m=Double.parseDouble(tf1.getText().trim());
tf2.setText("M");
tf1.setText("0");
str.setLength(0);
}
else if(e2.getSource()==b6)//M+為將顯示的數字與已經存儲的數據相加要查看新的數字單擊MR
{
m=m+Double.parseDouble(tf1.getText().trim());
}
else//選擇的是其他的按鈕
{
if(e2.getSource()==b22)//如果選擇的是"0"這個數字鍵
{
if(tf1.getText().trim().equals("0"))//如果顯示屏顯示的為零不做操作
{

}
else
{
tf1.setText(str.append(e2.getActionCommand()).toString());
y=Double.parseDouble(tf1.getText().trim());
}
}
else if(e2.getSource()==b0)//選擇的是「BackSpace」按鈕
{
if(!tf1.getText().trim().equals("0"))//如果顯示屏顯示的不是零
{
if(str.length()!=1)
{
tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能拋出字元串越界異常
}
else
{
tf1.setText("0");
str.setLength(0);
}
}
y=Double.parseDouble(tf1.getText().trim());
}
else//其他的數字鍵
{
tf1.setText(str.append(e2.getActionCommand()).toString());
y=Double.parseDouble(tf1.getText().trim());
}
}
}
catch(NumberFormatException e){
tf1.setText("數字格式異常");
}
catch( e){
tf1.setText("字元串索引越界");
}
}
}
public static void main(String args[])
{
new Counter();

『捌』 計算器源代碼

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
/**
* 一個計算器，與Windows附件自帶計算器的標准版功能、界面相仿。
* 但還不支持鍵盤操作。
*/
public class Calculator extends JFrame implements ActionListener {
/** 計算器上的鍵的顯示名字 */
private final String[] KEYS = { "7", "8", "9", "/", "sqrt", "4", "5", "6",
"*", "%", "1", "2", "3", "-", "1/x", "0", "+/-", ".", "+", "=" };
/** 計算器上的功能鍵的顯示名字 */
private final String[] COMMAND = { "Backspace", "CE", "C" };
/** 計算器左邊的M的顯示名字 */
private final String[] M = { " ", "MC", "MR", "MS", "M+" };
/** 計算器上鍵的按鈕 */
private JButton keys[] = new JButton[KEYS.length];
/** 計算器上的功能鍵的按鈕 */
private JButton commands[] = new JButton[COMMAND.length];
/** 計算器左邊的M的按鈕 */
private JButton m[] = new JButton[M.length];
/** 計算結果文本框 */
private JTextField resultText = new JTextField("0");

// 標志用戶按的是否是整個表達式的第一個數字,或者是運算符後的第一個數字
private boolean firstDigit = true;
// 計算的中間結果。
private double resultNum = 0.0;
// 當前運算的運算符
private String operator = "=";
// 操作是否合法
private boolean operateValidFlag = true;
/**
* 構造函數
*/
public Calculator(){
super();
//初始化計算器
init();
//設置計算器的背景顏色
this.setBackground(Color.LIGHT_GRAY);
this.setTitle("計算器");
//在屏幕(500, 300)坐標處顯示計算器
this.setLocation(500, 300);
//不許修改計算器的大小
this.setResizable(false);
//使計算器中各組件大小合適
this.pack();
}
/**
* 初始化計算器
*/
private void init() {
// 文本框中的內容採用右對齊方式
resultText.setHorizontalAlignment(JTextField.RIGHT);
// 不允許修改結果文本框
resultText.setEditable(false);
// 設置文本框背景顏色為白色
resultText.setBackground(Color.WHITE);

//初始化計算器上鍵的按鈕，將鍵放在一個畫板內
JPanel calckeysPanel = new JPanel();
//用網格布局器，4行，5列的網格，網格之間的水平方向間隔為3個象素，垂直方向間隔為3個象素
calckeysPanel.setLayout(new GridLayout(4, 5, 3, 3));
for (int i = 0; i < KEYS.length; i++) {
keys[i] = new JButton(KEYS[i]);
calckeysPanel.add(keys[i]);
keys[i].setForeground(Color.blue);
}
//運算符鍵用紅色標示，其他鍵用藍色表示
keys[3].setForeground(Color.red);
keys[8].setForeground(Color.red);
keys[13].setForeground(Color.red);
keys[18].setForeground(Color.red);
keys[19].setForeground(Color.red);

//初始化功能鍵，都用紅色標示。將功能鍵放在一個畫板內
JPanel commandsPanel = new JPanel();
//用網格布局器，1行，3列的網格，網格之間的水平方向間隔為3個象素，垂直方向間隔為3個象素
commandsPanel.setLayout(new GridLayout(1, 3, 3, 3));
for (int i = 0; i < COMMAND.length; i++) {
commands[i] = new JButton(COMMAND[i]);
commandsPanel.add(commands[i]);
commands[i].setForeground(Color.red);
}

//初始化M鍵，用紅色標示，將M鍵放在一個畫板內
JPanel calmsPanel = new JPanel();
//用網格布局管理器，5行，1列的網格，網格之間的水平方向間隔為3個象素，垂直方向間隔為3個象素
calmsPanel.setLayout(new GridLayout(5, 1, 3, 3));
for (int i = 0; i < M.length; i++) {
m[i] = new JButton(M[i]);
calmsPanel.add(m[i]);
m[i].setForeground(Color.red);
}

//下面進行計算器的整體布局，將calckeys和command畫板放在計算器的中部，
//將文本框放在北部，將calms畫板放在計算器的西部。

//新建一個大的畫板，將上面建立的command和calckeys畫板放在該畫板內
JPanel panel1 = new JPanel();
//畫板採用邊界布局管理器，畫板里組件之間的水平和垂直方向上間隔都為3象素
panel1.setLayout(new BorderLayout(3, 3));
panel1.add("North", commandsPanel);
panel1.add("Center", calckeysPanel);

//建立一個畫板放文本框
JPanel top = new JPanel();
top.setLayout(new BorderLayout());
top.add("Center", resultText);

//整體布局
getContentPane().setLayout(new BorderLayout(3, 5));
getContentPane().add("North", top);
getContentPane().add("Center", panel1);
getContentPane().add("West", calmsPanel);
//為各按鈕添加事件偵聽器
//都使用同一個事件偵聽器，即本對象。本類的聲明中有implements ActionListener
for (int i = 0; i < KEYS.length; i++) {
keys[i].addActionListener(this);
}
for (int i = 0; i < COMMAND.length; i++) {
commands[i].addActionListener(this);
}
for (int i = 0; i < M.length; i++) {
m[i].addActionListener(this);
}
}

/**
* 處理事件
*/
public void actionPerformed(ActionEvent e) {
//獲取事件源的標簽
String label = e.getActionCommand();
if (label.equals(COMMAND[0])){
//用戶按了"Backspace"鍵
handleBackspace();
} else if (label.equals(COMMAND[1])) {
//用戶按了"CE"鍵
resultText.setText("0");
} else if (label.equals(COMMAND[2])){
//用戶按了"C"鍵
handleC();
} else if ("0123456789.".indexOf(label) >= 0) {
//用戶按了數字鍵或者小數點鍵
handleNumber(label);
// handlezero(zero);
} else {
//用戶按了運算符鍵
handleOperator(label);
}
}
/**
* 處理Backspace鍵被按下的事件
*/
private void handleBackspace() {
String text = resultText.getText();
int i = text.length();
if (i > 0) {
//退格，將文本最後一個字元去掉
text = text.substring(0, i - 1);
if (text.length() == 0) {
//如果文本沒有了內容，則初始化計算器的各種值
resultText.setText("0");
firstDigit = true;
operator = "=";
} else {
//顯示新的文本
resultText.setText(text);
}
}
}

/**
* 處理數字鍵被按下的事件
* @param key
*/
private void handleNumber(String key) {
if (firstDigit) {
//輸入的第一個數字
resultText.setText(key);
} else if ((key.equals(".")) && (resultText.getText().indexOf(".") < 0)){
//輸入的是小數點，並且之前沒有小數點，則將小數點附在結果文本框的後面
resultText.setText(resultText.getText() + ".");
} else if (!key.equals(".")) {
//如果輸入的不是小數點，則將數字附在結果文本框的後面
resultText.setText(resultText.getText() + key);
}
//以後輸入的肯定不是第一個數字了
firstDigit = false;
}
/**
* 處理C鍵被按下的事件
*/
private void handleC() {
//初始化計算器的各種值
resultText.setText("0");
firstDigit = true;
operator = "=";
}

/**
* 處理運算符鍵被按下的事件
* @param key
*/
private void handleOperator(String key) {
if (operator.equals("/")) {
//除法運算
//如果當前結果文本框中的值等於0
if (getNumberFromText() == 0.0){
//操作不合法
operateValidFlag = false;
resultText.setText("除數不能為零");
} else {
resultNum /= getNumberFromText();
}
} else if (operator.equals("1/x")) {
//倒數運算
if (resultNum == 0.0){
//操作不合法
operateValidFlag = false;
resultText.setText("零沒有倒數");
} else {
resultNum = 1 / resultNum;
}
} else if (operator.equals("+")){
//加法運算
resultNum += getNumberFromText();
} else if (operator.equals("-")){
//減法運算
resultNum -= getNumberFromText();
} else if (operator.equals("*")){
//乘法運算
resultNum *= getNumberFromText();
} else if (operator.equals("sqrt")) {
//平方根運算
resultNum = Math.sqrt(resultNum);
} else if (operator.equals("%")){
//百分號運算，除以100
resultNum = resultNum / 100;
} else if (operator.equals("+/-")){
//正數負數運算
resultNum = resultNum * (-1);
} else if (operator.equals("=")){
//賦值運算
resultNum = getNumberFromText();
}
if (operateValidFlag) {
//雙精度浮點數的運算
long t1;
double t2;
t1 = (long) resultNum;
t2 = resultNum - t1;
if (t2 == 0) {
resultText.setText(String.valueOf(t1));
} else {
resultText.setText(String.valueOf(resultNum));
}
}
//運算符等於用戶按的按鈕
operator = key;
firstDigit = true;
operateValidFlag = true;
}

/**
* 從結果文本框中獲取數字
* @return
*/
private double getNumberFromText() {
double result = 0;
try {
result = Double.valueOf(resultText.getText()).doubleValue();
} catch (NumberFormatException e){
}
return result;
}

public static void main(String args[]) {
Calculator calculator1 = new Calculator();
calculator1.setVisible(true);
calculator1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}