① java100行以上源代码，至少五个class以及一个interface，可以简单点
下面是一个可能的Java源代码，它包含了一个接口租冲薯（Shape）和五个类（Circle, Rectangle, Triangle, Square 和 Main）。它的功能是计算不同形状的面积和周长。
//定义一个接口Shape，有两判指个抽象方法：getArea()和getPerimeter()interface Shape { double getArea(); double getPerimeter();
}//定义一个类Circle，实现Shape接口class Circle implements Shape { //定义一个私有属性radius，表示圆的半径
private double radius; //定义一个公有构造方法，用于初始化radius
public Circle(double radius) { this.radius = radius;
} //实现getArea()方法，返回圆的面积
public double getArea() { return Math.PI * radius * radius;
} //实现getPerimeter()方法，返回圆的周长
public double getPerimeter() { return Math.PI * radius * 2;
}
}//定义一个类Rectangle，实现Shape接口class Rectangle implements Shape { //定义两个私有属性width和height，表示矩形的宽度和高度
private double width; private double height; //定义一个公有构造方法，用于初始化width和height
public Rectangle(double width, double height) { this.width = width; this.height = height;
} //实现getArea()方法，返回矩形的面积
public double getArea() { return width * height;
} //实现getPerimeter()方法，返回矩形的周长
public double getPerimeter() { return (width + height) *2;
}
}//定义一个类Triangle，实现Shape接口class Triangle implements Shape { //定义三个私有属性a,b,c表示三角形的三条边长
private double a; private double b; private double c; //定义一个公有构造方法，用于初始化a,b,c，并检查是否满足三角形条件（任意两边之和大于第三边）
public Triangle(double a, double b, double c) throws Exception{ if (a + b > c && a + c > b && b + c > a) {
this.a = a; this.b = b;
this.c = c;
} else {
throw new Exception("Invalid triangle");
}
} //实现getArea()方法，返回三角形的面积（使用海伦公式）
public double getArea() { //计算半周长p
double p = (a + b + c) /2; //计算并返回面积s（使用Math.sqrt()函数求平方根）
return Math.sqrt(p * (p - a) * (p - b) * (p - c));
} //实现getPerimeter()方法，返回三角形的周长
public double getPerimeter(){ return a + b + c;
}
}//定义一个类Square，继承Rectangle类，并重写构造方法和toString()方法class Square extends Rectangle { //重写构造方法，在调用父类构造方法时传入相弊者同的参数side作为width和height
public Square(double side){ super(side, side);
} //重写toString()方法，在原来基础上加上"Square:"前缀，并只显示side属性而不显示width和height属性（使用String.format()函数格式化字符串）
@Override
public String toString(){ return String.format("Square: side=%.2f", super.width); /* 或者直接使用super.getPerimeter()/4作为side */
/* return String.format("Square: side=%.2f", super.getPerimeter()/4); */
/* 注意：不能直接访问super.side属性，
② JAVA编程
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JSF JavaServer Faces in Action
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Spring in Action (第二版)
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Java Programming Cookbook
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Beginning Java Objects
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Ant: The Definitive Guide
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Pragmatic Project Automation
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jQuery Reference Guide
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Java 2 核心技术 卷1&卷2 CHM版
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Wrox Professional Java JDK 6 Edition
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The Java Language Specification
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Beginning Java Programming for Dummies 第二版
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Java 2 核心编程
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Java How to Program (第六版)
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Java All-In-One案头参考傻瓜书 (第二版)
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21天自学 Java 6 (2007年5月更新出版) PDF
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Java咖啡馆
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Thinking in Java(第四版)
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深入学习JFC SWING - Java基础类组件集
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J2EE全实例教程
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Java信息系统设计与开发实例(第二版)
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Java优化编程
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Effective Java
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Java信息系统设计与开发实例(第二版)
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Tricks of the Java Programming
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Wrox Professional Java Native Interfaces with SWT JFace
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Java Swing 第二版 PDF文字版 O'Relliy出版
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O'Reilly - Java Database Programming with JDBC
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Learning JQurey (2007年7月最新出版)
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Pragmatic Unit Testing in Java with JUnit
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Wiley出版 J2EE 1.4 Bible
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J2EE设计开发编程指南
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Java Web Services简明教程
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O'Reilly Java and XML (第二版PDF)
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O'Reilly Java and XML (第三版PDF)
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Java Reflection in Action [MANNING]
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Java Puzzler (Java 解惑)
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Java Database Best Practices
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Struts: The Complete Reference
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Log4j The Complete Manual
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Expert One-on-One J2EE Development without EJB
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The Java Programming Language (第四版)
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Professional Java Development with the Spring Framework
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Core Java Server Faces 第二版
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精通Enterprise JavaBeans
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Enterprise JavaBeans EJB 第四版
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J2EE应用与BEA WebLogic Server (第二版PDF)
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O'Reilly Java Web Services
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Ant权威指南
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Java Web Services简明教程
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Cross-Platform Web Services Using C# and Java
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O'Reilly Ajax on Java
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O'Reilly Java and XSLT
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O'Reilly Java and XML Binding
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O'Reilly Java and SOAP
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Design Patterns Java Companion
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J2EE Java黑客大曝光 开发安全的Java应用程序
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J2ME API 速查手册
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企业级Java安全性(构建安全的J2EE应用)
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Java语言集成开发环境Eclipse中文教程
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NetBeans IDE 5.5 企业版高级开发教程
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Using Enterprise JavaBeans 2
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Borland JBuilder Developer's Guide
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Eclipse [O'Reilly]
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Eclipse精要与高级开发技术
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Code Generation in Action
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Java 6 3D游戏开发
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③ 急求JAVA源代码，小游戏或者别的
//这是个聊天程序， 在ECLIPSE 运行 Client.java 就可以了。 连接是：localhost
//Server 代码，
package message;
import java.io.*;
import java.net.*;
import java.util.*;
public class Server {
public static void main(String[] args) throws Exception{
System.out.print("Server");
ServerSocket socket=new ServerSocket(8888);
Vector v=new Vector();
while(true){
Socket sk=socket.accept();
DataInputStream in=new DataInputStream(sk.getInputStream());
DataOutputStream out=new DataOutputStream(sk.getOutputStream());
v.add(sk);
new ServerThread(in,v).start();
}
}
}
//ServerThread.java 代码
package message;
import java.net.*;
import java.io.*;
import java.util.*;
public class ServerThread extends Thread{
DataInputStream in;
Vector all;
public ServerThread(DataInputStream in,Vector v){
this.in=in;
this.all=v;
}
public void run()
{
while(true)
{
try{
String s1=in.readUTF();
for(int i=0;i<all.size();i++)
{
Object obj=all.get(i);
Socket socket=(Socket)obj;
DataOutputStream out=new DataOutputStream(socket.getOutputStream());
out.writeUTF(s1);
System.out.print(i);
out.flush();
}
System.out.print("Message send over!");
}catch(Exception e){e.printStackTrace();};
}
}
}
//ClientFrame.java 代码
package message;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;
import java.io.*;
public class ClientFrame extends JFrame implements ActionListener{
JButton b1=new JButton ("SendMessage");
JButton b2=new JButton("Link Server");
JTextField t1=new JTextField(20);
JTextField t2=new JTextField(20);
JLabel l=new JLabel("输入服务器名字:");
JTextArea area=new JTextArea(10,20);
JPanel p1=new JPanel();
JPanel p2=new JPanel();
JPanel p3=new JPanel();
JPanel p4=new JPanel();
Socket socket;
public ClientFrame()
{
this.getContentPane().add(p1);
p2.add(new JScrollPane(area));
p3.add(t1);
p3.add(b1);
p4.add(l);
p4.add(t2);
p4.add(b2);
p2.setLayout(new FlowLayout());
p3.setLayout(new FlowLayout());
p4.setLayout(new FlowLayout());
p1.setLayout(new BorderLayout());
p1.add("North",p2);
p1.add("Center",p3);
p1.add("South",p4);
b1.addActionListener(this);
b2.addActionListener(this);
this.pack();
show();
}
public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals("Link Server"))
{
try{
socket=new Socket(t2.getText(),8888);
b2.setEnabled(false);
JOptionPane.showMessageDialog(this, "Connection Success");
DataInputStream in=new DataInputStream(socket.getInputStream());
new ClientThread(in,area).start();
}
catch(Exception e1){
JOptionPane.showMessageDialog(this, "Connection Error");
e1.printStackTrace();};
}
else if(e.getActionCommand().equals("SendMessage"))
{
try{
DataOutputStream out=new DataOutputStream(socket.getOutputStream());
out.writeUTF(t1.getText());
t1.setText("");
}catch(Exception e1){e1.printStackTrace();};
}
}
}
//ClientThread.java 代码
package message;
import java.net.*;
import java.io.*;
import javax.swing.*;
public class ClientThread extends Thread {
DataInputStream in;
JTextArea area;
public ClientThread(DataInputStream in,JTextArea area){
this.in=in;
this.area=area;
}
public void run()
{
while(true){
try{
String s=in.readUTF();
area.append(s);
}
catch(Exception e){e.printStackTrace();};
}
}
}
//Client.java代码
package message;
public class Client {
/**
* @param args
*/
public static void main(String[] args) {
new ClientFrame();
}
}
// 每段代码都是个类，不要弄在一个文件里。 运行 Client.java
good luck to you!
④ 求一个JAVA游戏代码！！！急！！！
俄罗斯方侍告块——java源代码提供
import java.awt.*;
import java.awt.event.*;
//俄罗斯方块类
public class ERS_Block extends Frame{
public static boolean isPlay=false;
public static int level=1,score=0;
public static TextField scoreField,levelField;
public static MyTimer timer;
GameCanvas gameScr;
public static void main(String[] argus){
ERS_Block ers = new ERS_Block("俄罗斯方块游戏 V1.0 Author:Vincent");
WindowListener win_listener = new WinListener();
ers.addWindowListener(win_listener);
}
//俄罗斯方块类的构造方法
ERS_Block(String title){
super(title);
setSize(600,480);
setLayout(new GridLayout(1,2));
gameScr = new GameCanvas();
gameScr.addKeyListener(gameScr);
timer = new MyTimer(gameScr);
timer.setDaemon(true);
timer.start();
timer.suspend();
add(gameScr);
Panel rightScr = new Panel();
rightScr.setLayout(new GridLayout(2,1,0,30));
rightScr.setSize(120,500);
add(rightScr);
//右边信息窗体的布局
MyPanel infoScr = new MyPanel();
infoScr.setLayout(new GridLayout(4,1,0,5));
infoScr.setSize(120,300);
rightScr.add(infoScr);
/和物/定义标签和初始值
Label scorep = new Label("分数:",Label.LEFT);
Label levelp = new Label("级数:",Label.LEFT);
scoreField = new TextField(8);
levelField = new TextField(8);
scoreField.setEditable(false);
levelField.setEditable(false);
infoScr.add(scorep);
infoScr.add(scoreField);
infoScr.add(levelp);
infoScr.add(levelField);
scorep.setSize(new Dimension(20,60));
scoreField.setSize(new Dimension(20,60));
levelp.setSize(new Dimension(20,60));
levelField.setSize(new Dimension(20,60));
scoreField.setText("0");
levelField.setText("1");
//右边控制按钮窗体的布局
MyPanel controlScr = new MyPanel();
controlScr.setLayout(new GridLayout(5,1,0,5));
rightScr.add(controlScr);
//定义按唤谈液钮play
Button play_b = new Button("开始游戏");
play_b.setSize(new Dimension(50,200));
play_b.addActionListener(new Command(Command.button_play,gameScr));
//定义按钮Level UP
Button level_up_b = new Button("提高级数");
level_up_b.setSize(new Dimension(50,200));
level_up_b.addActionListener(new Command(Command.button_levelup,gameScr));
//定义按钮Level Down
Button level_down_b =new Button("降低级数");
level_down_b.setSize(new Dimension(50,200));
level_down_b.addActionListener(new Command(Command.button_leveldown,gameScr));
//定义按钮Level Pause
Button pause_b =new Button("游戏暂停");
pause_b.setSize(new Dimension(50,200));
pause_b.addActionListener(new Command(Command.button_pause,gameScr));
//定义按钮Quit
Button quit_b = new Button("退出游戏");
quit_b.setSize(new Dimension(50,200));
quit_b.addActionListener(new Command(Command.button_quit,gameScr));
controlScr.add(play_b);
controlScr.add(level_up_b);
controlScr.add(level_down_b);
controlScr.add(pause_b);
controlScr.add(quit_b);
setVisible(true);
gameScr.requestFocus();
}
}
//重写MyPanel类，使Panel的四周留空间
class MyPanel extends Panel{
public Insets getInsets(){
return new Insets(30,50,30,50);
}
}
//游戏画布类
class GameCanvas extends Canvas implements KeyListener{
final int unitSize = 30; //小方块边长
int rowNum; //正方格的行数
int columnNum; //正方格的列数
int maxAllowRowNum; //允许有多少行未削
int blockInitRow; //新出现块的起始行坐标
int blockInitCol; //新出现块的起始列坐标
int [][] scrArr; //屏幕数组
Block b; //对方快的引用
//画布类的构造方法
GameCanvas(){
rowNum = 15;
columnNum = 10;
maxAllowRowNum = rowNum - 2;
b = new Block(this);
blockInitRow = rowNum - 1;
blockInitCol = columnNum/2 - 2;
scrArr = new int [32][32];
}
//初始化屏幕，并将屏幕数组清零的方法
void initScr(){
for(int i=0;i<rowNum;i++)
for (int j=0; j<columnNum;j++)
scrArr[j]=0;
b.reset();
repaint();
}
//重新刷新画布方法
public void paint(Graphics g){
for(int i = 0; i < rowNum; i++)
for(int j = 0; j < columnNum; j++)
drawUnit(i,j,scrArr[j]);
}
//画方块的方法
public void drawUnit(int row,int col,int type){
scrArr[row][col] = type;
Graphics g = getGraphics();
tch(type){ //表示画方快的方法
case 0: g.setColor(Color.black);break; //以背景为颜色画
case 1: g.setColor(Color.blue);break; //画正在下落的方块
case 2: g.setColor(Color.magenta);break; //画已经落下的方法
}
g.fill3DRect(col*unitSize,getSize().height-(row+1)*unitSize,unitSize,unitSize,true);
g.dispose();
}
public Block getBlock(){
return b; //返回block实例的引用
}
//返回屏幕数组中(row,col)位置的属性值
public int getScrArrXY(int row,int col){
if (row < 0 || row >= rowNum || col < 0 || col >= columnNum)
return(-1);
else
return(scrArr[row][col]);
}
//返回新块的初始行坐标方法
public int getInitRow(){
return(blockInitRow); //返回新块的初始行坐标
}
//返回新块的初始列坐标方法
public int getInitCol(){
return(blockInitCol); //返回新块的初始列坐标
}
//满行删除方法
void deleteFullLine(){
int full_line_num = 0;
int k = 0;
for (int i=0;i<rowNum;i++){
boolean isfull = true;
L1:for(int j=0;j<columnNum;j++)
if(scrArr[j] == 0){
k++;
isfull = false;
break L1;
}
if(isfull) full_line_num++;
if(k!=0 && k-1!=i && !isfull)
for(int j = 0; j < columnNum; j++){
if (scrArr[j] == 0)
drawUnit(k-1,j,0);
else
drawUnit(k-1,j,2);
scrArr[k-1][j] = scrArr[j];
}
}
for(int i = k-1 ;i < rowNum; i++){
for(int j = 0; j < columnNum; j++){
drawUnit(i,j,0);
scrArr[j]=0;
}
}
ERS_Block.score += full_line_num;
ERS_Block.scoreField.setText(""+ERS_Block.score);
}
//判断游戏是否结束方法
boolean isGameEnd(){
for (int col = 0 ; col <columnNum; col ++){
if(scrArr[maxAllowRowNum][col] !=0)
return true;
}
return false;
}
public void keyTyped(KeyEvent e){
}
public void keyReleased(KeyEvent e){
}
//处理键盘输入的方法
public void keyPressed(KeyEvent e){
if(!ERS_Block.isPlay)
return;
tch(e.getKeyCode()){
case KeyEvent.VK_DOWN:b.fallDown();break;
case KeyEvent.VK_LEFT:b.leftMove();break;
case KeyEvent.VK_RIGHT:b.rightMove();break;
case KeyEvent.VK_SPACE:b.leftTurn();break;
}
}
}
//处理控制类
class Command implements ActionListener{
static final int button_play = 1; //给按钮分配编号
static final int button_levelup = 2;
static final int button_leveldown = 3;
static final int button_quit = 4;
static final int button_pause = 5;
static boolean pause_resume = true;
int curButton; //当前按钮
GameCanvas scr;
//控制按钮类的构造方法
Command(int button,GameCanvas scr){
curButton = button;
this.scr=scr;
}
//按钮执行方法
public void actionPerformed (ActionEvent e){
tch(curButton){
case button_play:if(!ERS_Block.isPlay){
scr.initScr();
ERS_Block.isPlay = true;
ERS_Block.score = 0;
ERS_Block.scoreField.setText("0");
ERS_Block.timer.resume();
}
scr.requestFocus();
break;
case button_levelup:if(ERS_Block.level < 10){
ERS_Block.level++;
ERS_Block.levelField.setText(""+ERS_Block.level);
ERS_Block.score = 0;
ERS_Block.scoreField.setText(""+ERS_Block.score);
}
scr.requestFocus();
break;
case button_leveldown:if(ERS_Block.level > 1){
ERS_Block.level--;
ERS_Block.levelField.setText(""+ERS_Block.level);
ERS_Block.score = 0;
ERS_Block.scoreField.setText(""+ERS_Block.score);
}
scr.requestFocus();
break;
case button_pause:if(pause_resume){
ERS_Block.timer.suspend();
pause_resume = false;
}else{
ERS_Block.timer.resume();
pause_resume = true;
}
scr.requestFocus();
break;
case button_quit:System.exit(0);
}
}
}
//方块类
class Block {
static int[][] pattern = {
{0x0f00,0x4444,0x0f00,0x4444},//用十六进至表示，本行表示长条四种状态
{0x04e0,0x0464,0x00e4,0x04c4},
{0x4620,0x6c00,0x4620,0x6c00},
{0x2640,0xc600,0x2640,0xc600},
{0x6220,0x1700,0x2230,0x0740},
{0x6440,0x0e20,0x44c0,0x8e00},
{0x0660,0x0660,0x0660,0x0660}
};
int blockType; //块的模式号（0-6）
int turnState; //块的翻转状态（0-3）
int blockState; //快的下落状态
int row,col; //块在画布上的坐标
GameCanvas scr;
//块类的构造方法
Block(GameCanvas scr){
this.scr = scr;
blockType = (int)(Math.random() * 1000)%7;
turnState = (int)(Math.random() * 1000)%4;
blockState = 1;
row = scr.getInitRow();
col = scr.getInitCol();
}
//重新初始化块，并显示新块
public void reset(){
blockType = (int)(Math.random() * 1000)%7;
turnState = (int)(Math.random() * 1000)%4;
blockState = 1;
row = scr.getInitRow();
col = scr.getInitCol();
dispBlock(1);
}
//实现“块”翻转的方法
public void leftTurn(){
if(assertValid(blockType,(turnState + 1)%4,row,col)){
dispBlock(0);
turnState = (turnState + 1)%4;
dispBlock(1);
}
}
//实现“块”的左移的方法
public void leftMove(){
if(assertValid(blockType,turnState,row,col-1)){
dispBlock(0);
col--;
dispBlock(1);
}
}
//实现块的右移
public void rightMove(){
if(assertValid(blockType,turnState,row,col+1)){
dispBlock(0);
col++;
dispBlock(1);
}
}
//实现块落下的操作的方法
public boolean fallDown(){
if(blockState == 2)
return(false);
if(assertValid(blockType,turnState,row-1,col)){
dispBlock(0);
row--;
dispBlock(1);
return(true);
}else{
blockState = 2;
dispBlock(2);
return(false);
}
}
//判断是否正确的方法
boolean assertValid(int t,int s,int row,int col){
int k = 0x8000;
for(int i = 0; i < 4; i++){
for(int j = 0; j < 4; j++){
if((int)(pattern[t][s]&k) != 0){
int temp = scr.getScrArrXY(row-i,col+j);
if (temp<0||temp==2)
return false;
}
k = k >> 1;
}
}
return true;
}
//同步显示的方法
public synchronized void dispBlock(int s){
int k = 0x8000;
for (int i = 0; i < 4; i++){
for(int j = 0; j < 4; j++){
if(((int)pattern[blockType][turnState]&k) != 0){
scr.drawUnit(row-i,col+j,s);
}
k=k>>1;
}
}
}
}
//定时线程
class MyTimer extends Thread{
GameCanvas scr;
public MyTimer(GameCanvas scr){
this.scr = scr;
}
public void run(){
while(true){
try{
sleep((10-ERS_Block.level + 1)*100);
}
catch(InterruptedException e){}
if(!scr.getBlock().fallDown()){
scr.deleteFullLine();
if(scr.isGameEnd()){
ERS_Block.isPlay = false;
suspend();
}else
scr.getBlock().reset();
}
}
}
class WinListener extends WindowAdapter{
public void windowClosing (WindowEvent l){
System.exit(0);
}
}
⑤ 求JAVA源代码
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class GradeStatistic {
public static void main(String[] args) {
GradeStatistic gs = new GradeStatistic();
List<Mark> list = new ArrayList<Mark>();
float sum = 0;
while(true){
Scanner sc = new Scanner(System.in);
System.out.print("Please input student name: ");
String name = sc.nextLine();
if(name.equals("end")){
break;
}
System.out.print("Please input student score: ");
float score = sc.nextFloat();
sum += score;
list.add(gs.new Mark(name, score));
}
float max = list.get(0).getScore();
float min = list.get(0).getScore();
for(Mark mark: list){
if(max < mark.getScore()){
max = mark.getScore();
}
if(min > mark.getScore()){
min = mark.getScore();
}
}
float average = sum / list.size();
System.out.println("Average is: " + average);
System.out.println("Max is: " + max);
System.out.println("Min is: " + min);
}
private class Mark{
private String name;
private float score;
public Mark(String name, float score){
this.name = name;
this.score = score;
}
public String getName() {
return name;
}
public float getScore() {
return score;
}
}
}
----------------------
Please input student name: Zhang san
Please input student score: 100
Please input student name: Li Si
Please input student score: 91
Please input student name: Ec
Please input student score: 35
Please input student name: ma qi
Please input student score: 67
Please input student name: end
Average is: 73.25
Max is: 100.0
Min is: 35.0
⑥ 求编写一个超级简单的Java的程序源代码
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class Login {
public static void main(String args[]) {
LoginFrm frame = new LoginFrm();
}
}
class LoginFrm extends JFrame implements ActionListener{
JLabel nameLabel=new JLabel("用户名：");
JLabel pwdLabel=new JLabel("密码：");
JTextField name=new JTextField(10);
JPasswordField password=new JPasswordField(10);
JButton butnSure=new JButton("确定");
JButton butnCancel=new JButton("取消");
public LoginFrm() {
super("登陆");
setBounds(500, 200, 280, 220);
setVisible(true);
setLayout(null);
nameLabel.setBounds(45, 20, 100, 25);
add(nameLabel);
add(name);
name.setBounds(105, 20, 110, 25);
add(pwdLabel);
pwdLabel.setBounds(45, 60, 100, 25);
add(password);
password.setBounds(105, 60, 110, 25);
add(butnSure);
butnSure.setBounds(45, 100, 80, 25);
add(butnCancel);
butnCancel.setBounds(135, 100, 80, 25);
butnSure.addActionListener(this);
butnCancel.addActionListener(this);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
validate();//刷新
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() ==butnSure){
System.out.println("用户名："+name.getText());
System.out.println("密码："+name.getText());
if("admin".equals(name.getText().trim())&&"123".equals(password.getText().trim())){
this.dispose();
new MainFrm("用户界面",name.getText().trim(),password.getText().trim());
}else {
JOptionPane.showMessageDialog(this, "用户不存在");
}
}else if(e.getSource()==butnCancel){
System.exit(1);
}
}
class MainFrm extends JFrame{
private JLabel info;
public MainFrm(String s,String name,String password) {
super(s);
setBounds(400, 200, 500, 400);
setLayout(new FlowLayout());
info=new JLabel("登陆成功，用户名："+name+"，密码："+password);
add(info);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
validate();
}
}
}
⑦ 我想看一点简单的Java程序的源代码
兄弟可以联系 hi留言也行
我这里保留了，从学习java第一天起到现在 学习练习代码，
基础部分注释很详细。
//每一位相加求和
public class Demo
{
public static void main(String[] args)
{
int i = 45678;
int sum = 0;
int c = 0;
for(int j = 4; j >= 0; j--)
{
int b = (int) Math.pow(10, j);
c = i / b;
System.out.println(c);
sum += c;
System.out.println("sum=" + sum);
i %= b;
}
System.out.println(sum);
}
}
public class ZY1030
{
public static void main(String[] asgs)
{
zy1();
zy2();
zy3();
zy4();
zy5();
zy6();
zy7();
yanghuisanjiao();
}
public static void yanghuisanjiao()
{
int[][] pas = new int[6][];
for(int i = 0; i < pas.length; i++)
{
pas[i] = new int[i + 1];
pas[i][0] = 1;
pas[i][i] = 1;
for(int j = 0; j < pas[i].length - 1; j++)
{
if(j >= 1 && i > 1)
pas[i][j] = pas[i - 1][j - 1] + pas[i - 1][j];
}
}
for(int i = 0; i < pas.length; i++)
{
for(int j = 0; j < pas[i].length; j++)
{
System.out.print(pas[i][j]);
System.out.println();
}
}
System.out.println();
}
private static void zy1()
{
System.out.println("��ҵ1");
/*
*
**
***
****
*****
******
*******
*/
for(int r = 0; r < 7; r++)
{
for(int j = 0; j < r + 1; j++)
{
System.out.print("*");
}
System.out.println();
}
}
private static void zy2()
{
System.out.println("\n��ҵ2");
/*
*
***
*****
*******
*********
*/
for(int r = 0; r <= 5; r++)
{
for(int j = 0; j < 11 - r; j++)
{
System.out.print(" ");
}
for(int j = 0; j < r * 2 + 1; j++)
{
System.out.print("*");
}
System.out.println();
}
}
private static void zy3()
{
System.out.println("\n��ҵ3");
/*
*
* *
* * *
* * * *
* * * * *
*/
for(int r = 0; r <= 5; r++)
{
for(int j = 0; j < 10 - r; j++)
{
System.out.print(" ");
}
for(int j = 0; j < r; j++)
{
System.out.print("* ");
}
System.out.println();
}
}
private static void zy4()
{
System.out.println("\n��ҵ4");
/*
***********
***********
***********
***********
***********
*/
for(int r = 0; r <= 5; r++)
{
for(int j = 0; j < 7 - r; j++)
{
System.out.print(" ");
}
for(int j = 0; j < 10; j++)
{
System.out.print("*");
}
System.out.println();
}
}
private static void zy5()
{
System.out.println("\n��ҵ5");
/*
1X1=1
1X2=2 2X2=4
1X3=3 2X3=6 3X3=9
....
*/
for(int r = 1; r <= 9; r++)
{
for(int j = 1; j <= r; j++)
{
int iValue = j * r; //����ֵ
String str = j + "X" + r + "=" + iValue + " ";
System.out.print(str);
//System.out.print(" J:" + j);
}
System.out.println();
//System.out.println("R:" + r);
}
}
private static void zy6()
{
System.out.println("\n��ҵ6");
/*
������(����) ֻ�ܱ�1�ͱ����������������
3 5 7 11 13 17 19 23 ....
int n = 4;
boolean t = true; // assume is SU_SHU
for(int i=2; i<n; i++)
{
if(n%i==0)
{
t = false;
break;
}
}
System.out.println(t);
*/
for(int i = 2; i <= 100; i++)
{
// if(i % 2 ==0 || i % 3 == 0 )
// {
// continue;
// }
// System.out.print(i + " ");
boolean bTrue = true;
for(int j = 2; j < i; j++)
{
if(i % j == 0)
{
bTrue = false;
break;
}
}
if(bTrue)
{
System.out.println(i);
}
}
System.out.println();
}
private static void zy7()
{
System.out.println("\n��ҵ7");
/*
int n = 23623;
int x = n % 100000 / 10000;
System.out.println(x);
x = n % 10000 / 1000;
System.out.println(x);
x = n % 1000 / 100;
System.out.println(x);
*/
}
}
⑧ 用JAVA 编程的源代码
直接定义两个接口学生接口里面定义一个学费的变量，老师接口里面定义一个工资变量，
eclipse里面可以自动帮你添加相关变量的getterhe
setter方法的。