java界面源碼

㈠ eclipse怎麼查看java源代碼

在Eclipse中查看JDK類庫的源代碼

設置：

1.點 「window」-> "Preferences" -> "Java" -> "Installed JRES"

㈡ java圖書管理界面系統的源代碼

javaswing登陸界面code
/*
* Login.java
*
* Created on __DATE__, __TIME__
*/

package com.agen.library.window;

import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
import javax.swing.;

import com.agen.library.factory.DAOFactory;
import com.agen.library.util.GlobalUser;
import com.agen.library.vo.User;

/**
*
* @author __USER__
*/
public class Login extends javax.swing.JFrame {

/**
*
*/
private static final long serialVersionUID = -2176093732040600809L;
/** Creates new form Login */
public Login() {
super("易雲圖書管理軟體V1.0");
Image ime = Toolkit.getDefaultToolkit().getImage(
getClass().getResource("/images/ico.png"));
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch ( e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
setIconImage(ime);
initComponents();
setLocationRelativeTo(null);
this.setResizable(false);

}

/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
// GEN-BEGIN:initComponents
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jPasswordField1 = new javax.swing.JPasswordField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jMenuBar1 = new javax.swing.JMenuBar();
jMenu1 = new javax.swing.JMenu();
jMenuItem1 = new javax.swing.JMenuItem();
jMenu2 = new javax.swing.JMenu();
jMenuItem2 = new javax.swing.JMenuItem();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
addKeyListener(new java.awt.event.KeyAdapter() {
public void keyPressed(java.awt.event.KeyEvent evt) {
formKeyPressed(evt);
}

public void keyTyped(java.awt.event.KeyEvent evt) {
formKeyTyped(evt);
}
});

jLabel2.setFont(new java.awt.Font("微軟雅黑", 0, 14));
jLabel2.setText("\u7528\u6237\u540d\uff1a");

jLabel3.setFont(new java.awt.Font("微軟雅黑", 0, 14));
jLabel3.setText("\u5bc6 \u7801\uff1a");

jTextField1.setFont(new java.awt.Font("微軟雅黑", 0, 14));
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});

jPasswordField1.setFont(new java.awt.Font("微軟雅黑", 0, 12));
jPasswordField1.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyTyped(java.awt.event.KeyEvent evt) {
jPasswordField1KeyTyped(evt);
}
});

jButton1.setBackground(new java.awt.Color(223, 216, 216));
jButton1.setFont(new java.awt.Font("微軟雅黑", 0, 14));
jButton1.setText("\u767b\u9646");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});

jButton2.setBackground(new java.awt.Color(223, 216, 216));
jButton2.setFont(new java.awt.Font("微軟雅黑", 0, 14));
jButton2.setText("\u53d6\u6d88");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});

jLabel1.setIcon(new javax.swing.ImageIcon(
getClass().getResource("/images/login_main.jpg"))); // NOI18N

jMenu1.setText("File");
jMenu1.setFont(new java.awt.Font("微軟雅黑", 0, 14));

jMenuItem1.setAccelerator(javax.swing.KeyStroke.getKeyStroke(
java.awt.event.KeyEvent.VK_Q,
java.awt.event.InputEvent.CTRL_MASK));
jMenuItem1.setText("Exit");
jMenuItem1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jMenuItem1MouseClicked(evt);
}
});
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jMenuItem1ActionPerformed(evt);
}
});
jMenu1.add(jMenuItem1);

jMenuBar1.add(jMenu1);

jMenu2.setText("Help");
jMenu2.setFont(new java.awt.Font("微軟雅黑", 0, 14));

jMenuItem2.setText("About");
jMenuItem2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jMenuItem2ActionPerformed(evt);
}
});
jMenu2.add(jMenuItem2);

jMenuBar1.add(jMenu2);

setJMenuBar(jMenuBar1);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(
getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(layout
.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addGroup(
layout.createSequentialGroup()
.addContainerGap()
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.TRAILING,
false)
.addComponent(
jLabel2,
javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
javax.swing.GroupLayout.Alignment.LEADING,
layout.createSequentialGroup()
.addComponent(
jLabel3)
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout.createSequentialGroup()
.addGap(10,
10,
10)
.addComponent(
jButton1)
.addGap(47,
47,
47)
.addComponent(
jButton2))
.addComponent(
jPasswordField1)
.addComponent(
jTextField1,
javax.swing.GroupLayout.DEFAULT_SIZE,
197,
Short.MAX_VALUE))
.addContainerGap()))));
layout.setVerticalGroup(layout
.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(
layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(
jTextField1,
javax.swing.GroupLayout.PREFERRED_SIZE,
24,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(
jPasswordField1,
javax.swing.GroupLayout.PREFERRED_SIZE,
23,
javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(
javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(
layout.createParallelGroup(
javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jButton2))
.addContainerGap(
javax.swing.GroupLayout.DEFAULT_SIZE,
Short.MAX_VALUE)));

pack();
}// </editor-fold>
// GEN-END:initComponents

private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:
About.start();
}

private void jPasswordField1KeyTyped(java.awt.event.KeyEvent evt) {
if (evt.getKeyChar() == '\n') {
String name = jTextField1.getText(); // 獲取用戶名
String pass = String.valueOf(jPasswordField1.getPassword());// 獲取密碼
User user = null;

// 未輸入用戶名
if (name.equals("") || name == null) {
JOptionPane.showMessageDialog(this, "用戶名不允許為空！", "cuowu", 0);
return;
}
try {
user = DAOFactory.getIUserDAOInstance().findById(name);
if (user != null) {
if (user.getPass() != null && user.getPass().equals(pass)) {

GlobalUser.LOGIN_USER = user; // 記錄當前用戶

// 進入主界面
Main.start();
this.dispose();
} else {
JOptionPane.showMessageDialog(this, "用戶名或密碼錯誤!");
return;
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (user == null) {
JOptionPane.showMessageDialog(this, "用戶名或密碼錯誤!", "消息", 0);
return;
}

}

}

private void formKeyTyped(java.awt.event.KeyEvent evt) {

}

private void formKeyPressed(java.awt.event.KeyEvent evt) {

}

private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
jTextField1.setText("");
jPasswordField1.setText("");
jTextField1.requestFocus();

}

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String name = jTextField1.getText(); // 獲取用戶名
String pass = String.valueOf(jPasswordField1.getPassword());// 獲取密碼
User user = null;

// 未輸入用戶名
if (name.equals("")) {
JOptionPane.showMessageDialog(this, "用戶名不允許為空！");
return;
}
try {
user = DAOFactory.getIUserDAOInstance().findById(name);
if (user != null) {
if (user.getPass() != null && user.getPass().equals(pass)) {

GlobalUser.LOGIN_USER = user; // 記錄當前用戶

// 進入主界面
Main.start();
this.dispose();
} else {
JOptionPane.showMessageDialog(this, "用戶名或密碼錯誤!", "消息", 0);
return;
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (user == null) {
JOptionPane.showMessageDialog(this, "用戶名或密碼錯誤!", "消息", 0);
return;
}

}

private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
if (JOptionPane.showConfirmDialog(this, "你確定要退出嗎？", "提示",
JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {
System.exit(0);
}
}

private void jMenuItem1MouseClicked(java.awt.event.MouseEvent evt) {
System.exit(1);
}

/**
* @param args
* the command line arguments
*/
public static void main(String args[]) {
// System.out.println(Login.class.getResource("src/images/images/login_main.jpg"));
// new javax.swing.ImageIcon(
// Login.class.getResource("../../../../images/login_main.jpg"));
// new Login().setVisible(true);
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Login().setVisible(true);
}
});
}

// GEN-BEGIN:variables
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenu jMenu2;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem jMenuItem1;
private javax.swing.JMenuItem jMenuItem2;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JTextField jTextField1;
// End of variables declaration//GEN-END:variables

}

㈢ java登陸界面源代碼是個類文件，怎樣運行文件

下載jdk並安裝，之後設置下環境變數。然後直接在命令行運行就可以了（用命令java *(*代表類名)）

㈣ 如何查看javaJDK中底層源碼

在初次使用java時，往往我們對最基本的java類會忽略對其內部基本的實現的了解，也往往不屑於了解其內部實現機制，以為它們本來就是這樣子。而其實貫穿java的整個過程，所有上層的使用，都是源於對底層的擴展，所以要真正去了解這門語言，就必須得從其底層開始認真去了解它。而要深入了解，就需要更多去關注其內部的實現是怎樣子的。

在使用IDE的過程中，我們經常會需要能在IDE中就可以便捷的去查看java的源碼，但若沒有做相關設置，一般在IDE是查看不了java源碼的，此次提供在eclipse中設置查看java源碼的方式。

設置步驟如下:

1.點 「window」-> "Preferences" -> "Java" -> "Installed JRES"

2.此時"Installed JRES"右邊是列表窗格，列出了系統中的 JRE 環境，選擇你的JRE，然後點邊上的 "Edit..."， 會出現一個窗口(Edit JRE)

3.選中rt.jar文件的這一項：「c:program filesjavajre_1.8lib t.jar」
點 左邊的「+」 號展開它，

4.展開後，可以看到「Source Attachment:(none)」，點這一項，點右邊的按鈕「Source Attachment...」, 選擇你的JDK目錄下的 「src.zip」文件(該文件在JDK安裝目錄的根目錄下)

5.一路點"ok"，設置完成

設置完成後，按住ctrl鍵再用滑鼠單擊某一個jdk方法名或類名，便能看到該方法的源代碼了。此外按F3也能實現。

PS：rt.jar包含了jdk的基礎類庫，也就是你在java

doc裡面看到的所有的類的class文件；src.zip文件裡面放著的正是基本類所對應的源文件（即*.java格式的文件）；同理，我們可以去網上下載各個JAVA開源框架所對應的源代碼包，比如spring-src.zip，然後再按照上面的設置步驟設置，就可以查看到對應的JAVA框架源代碼了。

轉自：網頁鏈接

㈤ 求一java程序，一個界面計算器源代碼，跪求大神，有注釋最好。。

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
public class GUI extends JFrame implements ActionListener {//實現監聽介面
JTextField field = new JTextField(15);
double num1=0,num2;
char op;
public GUI(){
setLayout(new BorderLayout(10,10));
JPanel p1 = new JPanel(new FlowLayout(FlowLayout.CENTER));

p1.add(new JLabel("計算框："));
p1.add(field);

add(p1,BorderLayout.NORTH);

JPanel p2 = new JPanel(new GridLayout(4,1));
//添加按鈕
JButton bt1 = new JButton("1");
JButton bt2 = new JButton("2");
JButton bt3 = new JButton("3");
JButton bt4 = new JButton("4");
JButton bt5 = new JButton("5");
JButton bt6 = new JButton("6");
JButton bt7 = new JButton("7");
JButton bt8 = new JButton("8");
JButton bt9 = new JButton("9");
JButton bt0 = new JButton("0");
JButton btDel = new JButton("Del");
JButton btEqual = new JButton("=");
p2.add(bt1);p2.add(bt2);
p2.add(bt3); p2.add(bt4);
p2.add(bt5); p2.add(bt6);
p2.add(bt7);p2.add(bt8);
p2.add(bt9);p2.add(bt0);
p2.add(btDel);p2.add(btEqual);

add(p2,BorderLayout.CENTER);

JPanel p3 = new JPanel(new GridLayout(0,1));
JButton bta = new JButton("+");
JButton btb = new JButton("-");
JButton btc = new JButton("*");
JButton btd = new JButton("/");
p3.add(bta);p3.add(btb);
p3.add(btc);p3.add(btd);
add(p3,BorderLayout.EAST);
//添加監聽器
bt1.addActionListener(this);
bt2.addActionListener(this);
bt3.addActionListener(this);
bt4.addActionListener(this);
bt5.addActionListener(this);
bt6.addActionListener(this);
bt7.addActionListener(this);
bt8.addActionListener(this);
bt9.addActionListener(this);
bt0.addActionListener(this);
bta.addActionListener(this);
btb.addActionListener(this);
btc.addActionListener(this);
btd.addActionListener(this);
btDel.addActionListener(this);
btEqual.addActionListener(this);

}
//事件的響應
public void actionPerformed(ActionEvent e){

String str =e.getActionCommand();
String s1 = field.getText();
if(str!="+"&&str!="-"&&str!="*"&&str!="/"&&str!="="&&str!="Del"){//為數字按鈕時
field.setText(s1+str);
}
else if(str=="Del"){//刪除鍵
field.setText("");
str=null;
}

else if(str=="="){//等號按鈕
s1 =field.getText();
String t2 ="";
int flag=0;//標記操作符的位置
if(s1.indexOf("+")!=-1)
flag = s1.indexOf("+");
if(s1.indexOf("-")!=-1)
flag = s1.indexOf("-");
if(s1.indexOf("*")!=-1)
flag = s1.indexOf("*");
if(s1.indexOf("/")!=-1)
flag = s1.indexOf("/");
for(int i=flag+1;i<s1.length();i++)
{
t2+=s1.charAt(i);//獲得第二個操作數
}

num2 =Double.parseDouble(t2);//將第二個操作數轉換為double
switch(op){
case '+': num1+=num2;break;
case '-': num1-=num2;break;
case '*': num1*=num2;break;
case '/': num1/=num2;break;
}
field.setText(s1+"="+num1+"");//顯示在文本框里
}
else{//加減乘除符號
num1 = Double.parseDouble(field.getText());
field.setText(s1+str);
op = str.charAt(0);//獲得操作符
}
}
public static void main(String[] args){
GUI frame = new GUI();
frame.setTitle("簡易計算器");
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,200);
//frame.pack();
frame.setVisible(true);
}
}

不懂再問

㈥ 什麼是java源代碼 怎麼查看

不知道你說的是瀏覽器的還是什麼的，
如果是瀏覽器的那麼簡單找到工具-查看源代碼，你就能看見代碼了，
還有一個就是被編譯成class文件的java用反編譯工具可以看到源代碼，
如果以上都不是你想要的答案，那麼你所說的代碼就是程序員寫好的代碼文件

㈦ java圖形界面設計實驗，求源代碼！

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Calculator01 extends JFrame implements ActionListener {
JPanel jp1,jp2;
JTextField jt1,jt2,jt3;
JButton btn_add,btn_sub,btn_clean;


public Calculator01() {
init();
}

public void init() {
setTitle("簡易計算器");
setLocationRelativeTo(null);
setSize(600, 100);
jp1 = new JPanel();
jp2 = new JPanel();
add(jp1, BorderLayout.NORTH);
add(jp2,BorderLayout.SOUTH);
jt1 = new JTextField(15);
jp1.add(jt1);
jt2 = new JTextField(15);
jp1.add(jt2);
jt3 = new JTextField(15);
jp1.add(jt3);

btn_add = new JButton("+");
btn_add.addActionListener(this);
jp2.add(btn_add);
btn_sub = new JButton("-");
btn_sub.addActionListener(this);
jp2.add(btn_sub);
btn_clean = new JButton("清除");
btn_clean.addActionListener(this);
jp2.add(btn_clean);

setVisible(true);
}


public void actionPerformed(ActionEvent e)
{
if (e.getSource() == btn_clean)
{
jt1.setText("");
jt2.setText("");
jt3.setText("");
}
else
{
if (jt1.getText().equals("") || jt2.getText().equals(""))
{
JOptionPane.showMessageDialog(null, "請在前兩個框輸入數字");
}
else
{
double number1=Double.parseDouble(jt1.getText());
double number2=Double.parseDouble(jt2.getText());
double result=0;
if (e.getSource() == btn_add)
{
result = number1 + number2;
}
else
{
result = number1 - number2;
}
jt3.setText(""+result);
}
}
}
}

㈧ java源代碼如何用

java源代碼是用來關聯jar中的編譯代碼的。

應用場景：通常在打開eclipse中的jar的時候，發現class文件不能被打開，此時出現下面的界面，此時就需要通過「Attach Source」，之後找到對應的java源代碼來實現代碼關聯，即可正常的顯示class類中的內容。

備註：如果此處ava源代碼指的是源代碼文件（「.java」），是用來進行代碼維護和二次開發的必備東西。