java安卓小游戏源代码,java小游戏程序代码

基于Java语言的打地鼠的小游戏源代码是什么？

　public void mouseClicked(MouseEvent e){\x0d\x0aObject source=e.getSource(); //获取事件源，即地鼠标签\x0d\x0aif(source instanceof JLabel){ //如果事件是标签组件\x0d\x0aJLabel mouse=(JLabel)source; //强制转换为JLabel标签\x0d\x0amouse.setIcon(null); //取消标签图标\x0d\x0a}\x0d\x0a}\x0d\x0a});\x0d\x0athis.getContentPane().add(mouses[i]); //添加显示地鼠的标签到窗体\x0d\x0a}\x0d\x0a\x0d\x0amouses[0].setLocation(253, 300); //设置每个标签的位置\x0d\x0amouses[1].setLocation(333, 250);\x0d\x0amouses[2].setLocation(388, 296);\x0d\x0amouses[3].setLocation(362, 364);\x0d\x0amouses[4].setLocation(189, 353);\x0d\x0amouses[5].setLocation(240, 409);\x0d\x0a\x0d\x0afinal JLabel backLabel=new JLabel(); //创建显示背景的标签\x0d\x0abackLabel.setBounds(0, 0, img.getIconWidth(), img.getIconHeight());\x0d\x0athis.setBounds(100,100,img.getIconWidth(),img.getIconHeight());\x0d\x0abackLabel.setIcon(img); //添加背景到标签\x0d\x0athis.getContentPane().add(backLabel); //添加背景标签到窗体\x0d\x0a}\x0d\x0a/**\x0d\x0a* 线程的核心方法\x0d\x0a*/\x0d\x0a\x0d\x0apublic void run(){\x0d\x0awhile(true){ //使用无限循环\x0d\x0atry{\x0d\x0aThread.sleep(3000); //使线程休眠3秒\x0d\x0aint index=(int)(Math.random()*6); //生成随机的地鼠索引\x0d\x0aif(mouses[index].getIcon()==null){ //如果地鼠标签没有设置图片\x0d\x0amouses[index].setIcon(imgMouse); //为该标签添加地鼠图片\x0d\x0a}\x0d\x0a}catch(InterruptedException e){\x0d\x0ae.printStackTrace();\x0d\x0a}\x0d\x0a}\x0d\x0a}\x0d\x0a\x0d\x0a}

相关问答

Q1: java小游戏源代码

介绍这个给你把...我空间还有很多..

import java.applet.Applet;

import java.applet.AudioClip;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Toolkit;

import javax.sound.sampled.AudioFileFormat;

import javax.sound.sampled.AudioSystem;

import javax.swing.JFrame;

import javax.swing.JPanel;

import java.awt.Rectangle;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JOptionPane;

import javax.swing.JSlider;

import javax.swing.JLabel;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.io.File;

import java.util.Vector;

public class Frame extends JFrame implements Runnable {

JPanel contentPane;

JPanel jPanel1 = new JPanel();

JButton jButton1 = new JButton();

JSlider jSlider1 = new JSlider();

JLabel jLabel1 = new JLabel();

JButton jButton2 = new JButton();

JLabel jLabel2 = new JLabel();

int count = 1, rapidity = 80; // count 当前进行的个数, rapidity 游标的位置

int zhengque = 0, cuowu = 0;

int rush[] = { 10 ,20 ,30 };     //游戏每关的个数 可以自由添加.列 { 10 ,20 ,30 ,40,50}

int rush_count = 0;      //记录关数

char list[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',

'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',

'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9' };           //随机出现的数字 可以自由添加

Vector number = new Vector();

String paiduan = "true";

AudioClip Musci_anjian, Music_shibai, Music_chenggong;

public Frame() {

try {

setDefaultCloseOperation(EXIT_ON_CLOSE);

//-----------------声音文件---------------------

Musci_anjian = Applet.newAudioClip(new File("sounds//anjian.wav")

.toURL());

Music_shibai = Applet.newAudioClip(new File("sounds//shibai.wav")

.toURL());

Music_chenggong = Applet.newAudioClip(new File(

"sounds//chenggong.wav").toURL());

//---------------------------------------

jbInit();

} catch (Exception exception) {

exception.printStackTrace();

}

}

/**

* Component initialization.

*

* @throws java.lang.Exception

*/

private void jbInit() throws Exception {

contentPane = (JPanel) getContentPane();

contentPane.setLayout(null);

setSize(new Dimension(588, 530));

setTitle("Frame Title");

jPanel1.setBorder(BorderFactory.createEtchedBorder());

jPanel1.setBounds(new Rectangle(4, 4, 573, 419));

jPanel1.setLayout(null);

jButton1.setBounds(new Rectangle(277, 442, 89, 31));

jButton1.setText("开始");

jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));

jSlider1.setBounds(new Rectangle(83, 448, 164, 21));

jSlider1.setMaximum(100);

jSlider1.setMinimum(1);

jSlider1.setValue(50);

jLabel1.setText("速度");

jLabel1.setBounds(new Rectangle(35, 451, 39, 18));

jButton2.setBounds(new Rectangle(408, 442, 89, 31));

jButton2.setText("结束");

jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));

jLabel2.setText("第一关:100个");

jLabel2.setBounds(new Rectangle(414, 473, 171, 21));

contentPane.add(jPanel1);

contentPane.add(jButton2);

contentPane.add(jButton1);

contentPane.add(jSlider1);

contentPane.add(jLabel1);

contentPane.add(jLabel2);

this.addKeyListener(new MyListener());

jButton1.addKeyListener(new MyListener());

jSlider1.addKeyListener(new MyListener());

jSlider1.addChangeListener(new ChangeListener() {

public void stateChanged(ChangeEvent e) {

rapidity = jSlider1.getValue();

}

});

}

public void run() {

number.clear();

zhengque = 0;

cuowu = 0;

paiduan = "true";

while (count = rush[rush_count]) {

try {

Thread t = new Thread(new Tthread());

t.start();

count += 1;

Thread.sleep(1000 + (int) (Math.random() * 2000)); // 生产下组停顿时间

// 最快1快.最慢2秒

} catch (InterruptedException e) {

e.printStackTrace();

}

}

while (true) { // 等待最后一个字符消失

if (number.size() == 0) {

break;

}

}

if (zhengque == 0) { // 为了以后相除..如果全部正确或者错误就会出现错误. 所以..

zhengque = 1;

}

if (cuowu == 0) {

cuowu = 1;

}

if (paiduan.equals("true")) { // 判断是否是自然结束

if (zhengque / cuowu = 2) {

JOptionPane.showMessageDialog(null, "恭喜你过关了");

rush_count += 1; // 自动加1关

if (rush_count  rush.length) {

if (rapidity  10) { // 当速度大于10的时候在-5提加速度.怕速度太快

rapidity -= 5; // 速度自动减10毫秒

jSlider1.setValue(rapidity); // 选择位置

}

Thread t = new Thread(this);

t.start();

} else {

JOptionPane.showMessageDialog(null, "牛B...你通关了..");

rush_count = 0;

count = 0;

}

} else {

JOptionPane.showMessageDialog(null, "请再接再励");

rush_count = 0;

count = 0;

}

} else {

rush_count = 0;

count = 0;

}

}

public void jButton1_actionPerformed(ActionEvent e) {

Thread t = new Thread(this);

t.start();

}

public void jButton2_actionPerformed(ActionEvent e) {

count = rush[rush_count] + 1;

paiduan = "flase";

}

class Tthread implements Runnable {

public void run() {

boolean fo = true;

int Y = 0, X = 0;

JLabel show = new JLabel();

show.setFont(new java.awt.Font("宋体", Font.PLAIN, 33));

jPanel1.add(show);

X = 10 + (int) (Math.random() * 400);

String parameter = list[(int) (Math.random() * list.length)] + "";

Bean bean = new Bean();

bean.setParameter(parameter);

bean.setShow(show);

number.add(bean);

show.setText(parameter);

while (fo) {

// ---------------------数字下移--------------------

show.setBounds(new Rectangle(X, Y += 2, 33, 33));

try {

Thread.sleep(rapidity);

} catch (InterruptedException e) {

e.printStackTrace();

}

if (Y = 419) {

fo = false;

for (int i = number.size() - 1; i = 0; i--) {

Bean bn = ((Bean) number.get(i));

if (parameter.equalsIgnoreCase(bn.getParameter())) {

cuowu += 1;

jLabel2.setText("正确:" + zhengque + "个,错误:" + cuowu

+ "个");

number.removeElementAt(i);

Music_shibai.play();

break;

}

}

}

}

}

}

class MyListener extends KeyAdapter {

public void keyPressed(KeyEvent e) {

String uu = e.getKeyChar() + "";

for (int i = 0; i  number.size(); i++) {

Bean bean = ((Bean) number.get(i));

if (uu.equalsIgnoreCase(bean.getParameter())) {

zhengque += 1;

number.removeElementAt(i);

bean.getShow().setVisible(false);

jLabel2.setText("正确:" + zhengque + "个,错误:" + cuowu + "个");

Music_chenggong.play();

break;

}

}

Musci_anjian.play();

}

}

public static void main(String[] args) {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception exception) {

exception.printStackTrace();

}

Frame frame = new Frame();

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

Dimension frameSize = frame.getSize();

if (frameSize.height  screenSize.height) {

frameSize.height = screenSize.height;

}

if (frameSize.width  screenSize.width) {

frameSize.width = screenSize.width;

}

frame.setLocation((screenSize.width - frameSize.width) / 2,

(screenSize.height - frameSize.height) / 2);

frame.setVisible(true);

}

}

class Frame1_jButton2_actionAdapter implements ActionListener {

private Frame adaptee;

Frame1_jButton2_actionAdapter(Frame adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent e) {

adaptee.jButton2_actionPerformed(e);

}

}

class Frame1_jButton1_actionAdapter implements ActionListener {

private Frame adaptee;

Frame1_jButton1_actionAdapter(Frame adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent e) {

adaptee.jButton1_actionPerformed(e);

}

}

class Bean {

String parameter = null;

JLabel show = null;

public JLabel getShow() {

return show;

}

public void setShow(JLabel show) {

this.show = show;

}

public String getParameter() {

return parameter;

}

public void setParameter(String parameter) {

this.parameter = parameter;

}

}

Q2: 几个Java小游戏代码

package reduce;

import java.applet.Applet;

import java.applet.AudioClip;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Toolkit;

import javax.sound.sampled.AudioFileFormat;

import javax.sound.sampled.AudioSystem;

import javax.swing.JFrame;

import javax.swing.JPanel;

import java.awt.Rectangle;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JOptionPane;

import javax.swing.JSlider;

import javax.swing.JLabel;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.io.File;

import java.util.Vector;

public class Frame extends JFrame implements Runnable {

JPanel contentPane;

JPanel jPanel1 = new JPanel();

JButton jButton1 = new JButton();

JSlider jSlider1 = new JSlider();

JLabel jLabel1 = new JLabel();

JButton jButton2 = new JButton();

JLabel jLabel2 = new JLabel();

int count = 1, rapidity = 80; // count 当前进行的个数, rapidity 游标的位置

int zhengque = 0, cuowu = 0;

int rush[] = { 10 ,20 ,30 }; //游戏每关的个数 可以自由添加.列 { 10 ,20 ,30 ,40,50}

int rush_count = 0; //记录关数

char list[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',

'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',

'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9' }; //随机出现的数字 可以自由添加

Vector number = new Vector();

String paiduan = "true";

AudioClip Musci_anjian, Music_shibai, Music_chenggong;

public Frame() {

try {

setDefaultCloseOperation(EXIT_ON_CLOSE);

//-----------------声音文件---------------------

Musci_anjian = Applet.newAudioClip(new File("sounds//anjian.wav")

.toURL());

Music_shibai = Applet.newAudioClip(new File("sounds//shibai.wav")

.toURL());

Music_chenggong = Applet.newAudioClip(new File(

"sounds//chenggong.wav").toURL());

//---------------------------------------

jbInit();

} catch (Exception exception) {

exception.printStackTrace();

}

}

/**

* Component initialization.

*

* @throws java.lang.Exception

*/

private void jbInit() throws Exception {

contentPane = (JPanel) getContentPane();

contentPane.setLayout(null);

setSize(new Dimension(588, 530));

setTitle("Frame Title");

jPanel1.setBorder(BorderFactory.createEtchedBorder());

jPanel1.setBounds(new Rectangle(4, 4, 573, 419));

jPanel1.setLayout(null);

jButton1.setBounds(new Rectangle(277, 442, 89, 31));

jButton1.setText("开始");

jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));

jSlider1.setBounds(new Rectangle(83, 448, 164, 21));

jSlider1.setMaximum(100);

jSlider1.setMinimum(1);

jSlider1.setValue(50);

jLabel1.setText("速度");

jLabel1.setBounds(new Rectangle(35, 451, 39, 18));

jButton2.setBounds(new Rectangle(408, 442, 89, 31));

jButton2.setText("结束");

jButton2.addActionListener(new Frame1_jButton2_actionAdapter(this));

jLabel2.setText("第一关:100个");

jLabel2.setBounds(new Rectangle(414, 473, 171, 21));

contentPane.add(jPanel1);

contentPane.add(jButton2);

contentPane.add(jButton1);

contentPane.add(jSlider1);

contentPane.add(jLabel1);

contentPane.add(jLabel2);

this.addKeyListener(new MyListener());

jButton1.addKeyListener(new MyListener());

jSlider1.addKeyListener(new MyListener());

jSlider1.addChangeListener(new ChangeListener() {

public void stateChanged(ChangeEvent e) {

rapidity = jSlider1.getValue();

}

});

}

public void run() {

number.clear();

zhengque = 0;

cuowu = 0;

paiduan = "true";

while (count = rush[rush_count]) {

try {

Thread t = new Thread(new Tthread());

t.start();

count += 1;

Thread.sleep(1000 + (int) (Math.random() * 2000)); // 生产下组停顿时间

// 最快1快.最慢2秒

} catch (InterruptedException e) {

e.printStackTrace();

}

}

while (true) { // 等待最后一个字符消失

if (number.size() == 0) {

break;

}

}

if (zhengque == 0) { // 为了以后相除..如果全部正确或者错误就会出现错误. 所以..

zhengque = 1;

}

if (cuowu == 0) {

cuowu = 1;

}

if (paiduan.equals("true")) { // 判断是否是自然结束

if (zhengque / cuowu = 2) {

JOptionPane.showMessageDialog(null, "恭喜你过关了");

rush_count += 1; // 自动加1关

if (rush_count rush.length) {

if (rapidity 10) { // 当速度大于10的时候在-5提加速度.怕速度太快

rapidity -= 5; // 速度自动减10毫秒

jSlider1.setValue(rapidity); // 选择位置

}

Thread t = new Thread(this);

t.start();

} else {

JOptionPane.showMessageDialog(null, "牛B...你通关了..");

rush_count = 0;

count = 0;

}

} else {

JOptionPane.showMessageDialog(null, "请再接再励");

rush_count = 0;

count = 0;

}

} else {

rush_count = 0;

count = 0;

}

}

public void jButton1_actionPerformed(ActionEvent e) {

Thread t = new Thread(this);

t.start();

}

public void jButton2_actionPerformed(ActionEvent e) {

count = rush[rush_count] + 1;

paiduan = "flase";

}

class Tthread implements Runnable {

public void run() {

boolean fo = true;

int Y = 0, X = 0;

JLabel show = new JLabel();

show.setFont(new java.awt.Font("宋体", Font.PLAIN, 33));

jPanel1.add(show);

X = 10 + (int) (Math.random() * 400);

String parameter = list[(int) (Math.random() * list.length)] + "";

Bean bean = new Bean();

bean.setParameter(parameter);

bean.setShow(show);

number.add(bean);

show.setText(parameter);

while (fo) {

// ---------------------数字下移--------------------

show.setBounds(new Rectangle(X, Y += 2, 33, 33));

try {

Thread.sleep(rapidity);

} catch (InterruptedException e) {

e.printStackTrace();

}

if (Y = 419) {

fo = false;

for (int i = number.size() - 1; i = 0; i--) {

Bean bn = ((Bean) number.get(i));

if (parameter.equalsIgnoreCase(bn.getParameter())) {

cuowu += 1;

jLabel2.setText("正确:" + zhengque + "个,错误:" + cuowu

+ "个");

number.removeElementAt(i);

Music_shibai.play();

break;

}

}

}

}

}

}

class MyListener extends KeyAdapter {

public void keyPressed(KeyEvent e) {

String uu = e.getKeyChar() + "";

for (int i = 0; i number.size(); i++) {

Bean bean = ((Bean) number.get(i));

if (uu.equalsIgnoreCase(bean.getParameter())) {

zhengque += 1;

number.removeElementAt(i);

bean.getShow().setVisible(false);

jLabel2.setText("正确:" + zhengque + "个,错误:" + cuowu + "个");

Music_chenggong.play();

break;

}

}

Musci_anjian.play();

}

}

public static void main(String[] args) {

try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

} catch (Exception exception) {

exception.printStackTrace();

}

Frame frame = new Frame();

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

Dimension frameSize = frame.getSize();

if (frameSize.height screenSize.height) {

frameSize.height = screenSize.height;

}

if (frameSize.width screenSize.width) {

frameSize.width = screenSize.width;

}

frame.setLocation((screenSize.width - frameSize.width) / 2,

(screenSize.height - frameSize.height) / 2);

frame.setVisible(true);

}

}

class Frame1_jButton2_actionAdapter implements ActionListener {

private Frame adaptee;

Frame1_jButton2_actionAdapter(Frame adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent e) {

adaptee.jButton2_actionPerformed(e);

}

}

class Frame1_jButton1_actionAdapter implements ActionListener {

private Frame adaptee;

Frame1_jButton1_actionAdapter(Frame adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent e) {

adaptee.jButton1_actionPerformed(e);

}

}

class Bean {

String parameter = null;

JLabel show = null;

public JLabel getShow() {

return show;

}

public void setShow(JLabel show) {

this.show = show;

}

public String getParameter() {

return parameter;

}

public void setParameter(String parameter) {

this.parameter = parameter;

}

}

我只有一个打字母小游戏

Q3: 求java小游戏源代码

表1. CheckerDrag.java

// CheckerDrag.javaimport java.awt.*;import java.awt.event.*;public class CheckerDrag extends java.applet.Applet{ // Dimension of checkerboard square. // 棋盘上每个小方格的尺寸 final static int SQUAREDIM = 40; // Dimension of checkerboard -- includes black outline. // 棋盘的尺寸 – 包括黑色的轮廓线 final static int BOARDDIM = 8 * SQUAREDIM + 2; // Dimension of checker -- 3/4 the dimension of a square. // 棋子的尺寸 – 方格尺寸的3/4 final static int CHECKERDIM = 3 * SQUAREDIM / 4; // Square colors are dark green or white. // 方格的颜色为深绿色或者白色 final static Color darkGreen = new Color (0, 128, 0); // Dragging flag -- set to true when user presses mouse button over checker // and cleared to false when user releases mouse button. // 拖动标记 --当用户在棋子上按下鼠标按键时设为true， // 释放鼠标按键时设为false boolean inDrag = false; // Left coordinate of checkerboard's upper-left corner. // 棋盘左上角的左方向坐标 int boardx; // Top coordinate of checkerboard's upper-left corner. //棋盘左上角的上方向坐标 int boardy; // Left coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原点(左上角)的左方向坐标 int ox; // Top coordinate of checker rectangle origin (upper-left corner). // 棋子矩形原点(左上角)的上方向坐标 int oy; // Left displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按键时的鼠标坐标与棋子矩形原点之间的左方向位移 int relx; // Top displacement between mouse coordinates at time of press and checker // rectangle origin. // 在按键时的鼠标坐标与棋子矩形原点之间的上方向位移 int rely; // Width of applet drawing area. // applet绘图区域的宽度 int width; // Height of applet drawing area. // applet绘图区域的高度 int height; // Image buffer. // 图像缓冲 Image imBuffer; // Graphics context associated with image buffer. // 图像缓冲相关联的图形背景 Graphics imG; public void init () { // Obtain the size of the applet's drawing area. // 获取applet绘图区域的尺寸 width = getSize ().width; height = getSize ().height; // Create image buffer. // 创建图像缓冲 imBuffer = createImage (width, height); // Retrieve graphics context associated with image buffer. // 取出图像缓冲相关联的图形背景 imG = imBuffer.getGraphics (); // Initialize checkerboard's origin, so that board is centered. // 初始化棋盘的原点，使棋盘在屏幕上居中 boardx = (width - BOARDDIM) / 2 + 1; boardy = (height - BOARDDIM) / 2 + 1; // Initialize checker's rectangle's starting origin so that checker is // centered in the square located in the top row and second column from // the left. // 初始化棋子矩形的起始原点，使得棋子在第一行左数第二列的方格里居中 ox = boardx + SQUAREDIM + (SQUAREDIM - CHECKERDIM) / 2 + 1; oy = boardy + (SQUAREDIM - CHECKERDIM) / 2 + 1; // Attach a mouse listener to the applet. That listener listens for // mouse-button press and mouse-button release events. // 向applet添加一个用来监听鼠标按键的按下和释放事件的鼠标监听器 addMouseListener (new MouseAdapter () { public void mousePressed (MouseEvent e) { // Obtain mouse coordinates at time of press. // 获取按键时的鼠标坐标 int x = e.getX (); int y = e.getY (); // If mouse is over draggable checker at time // of press (i.e., contains (x, y) returns // true), save distance between current mouse // coordinates and draggable checker origin // (which will always be positive) and set drag // flag to true (to indicate drag in progress). // 在按键时如果鼠标位于可拖动的棋子上方 // （也就是contains (x, y)返回true），则保存当前 // 鼠标坐标与棋子的原点之间的距离（始终为正值）并且 // 将拖动标志设为true（用来表明正处在拖动过程中） if (contains (x, y)) { relx = x - ox; rely = y - oy; inDrag = true; } } boolean contains (int x, int y) { // Calculate center of draggable checker. // 计算棋子的中心位置 int cox = ox + CHECKERDIM / 2; int coy = oy + CHECKERDIM / 2; // Return true if (x, y) locates with bounds // of draggable checker. CHECKERDIM / 2 is the // radius. // 如果(x, y)仍处于棋子范围内则返回true // CHECKERDIM / 2为半径 return (cox - x) * (cox - x) + (coy - y) * (coy - y) CHECKERDIM / 2 * CHECKERDIM / 2; } public void mouseReleased (MouseEvent e) { // When mouse is released, clear inDrag (to // indicate no drag in progress) if inDrag is // already set. // 当鼠标按键被释放时，如果inDrag已经为true， // 则将其置为false（用来表明不在拖动过程中） if (inDrag) inDrag = false; } }); // Attach a mouse motion listener to the applet. That listener listens // for mouse drag events. //向applet添加一个用来监听鼠标拖动事件的鼠标运动监听器 addMouseMotionListener (new MouseMotionAdapter () { public void mouseDragged (MouseEvent e) { if (inDrag) { // Calculate draggable checker's new // origin (the upper-left corner of // the checker rectangle). // 计算棋子新的原点（棋子矩形的左上角） int tmpox = e.getX () - relx; int tmpoy = e.getY () - rely; // If the checker is not being moved // (at least partly) off board, // assign the previously calculated // origin (tmpox, tmpoy) as the // permanent origin (ox, oy), and // redraw the display area (with the // draggable checker at the new // coordinates). // 如果棋子（至少是棋子的一部分）没有被 // 移出棋盘，则将之前计算的原点 // (tmpox, tmpoy)赋值给永久性的原点(ox, oy)， // 并且刷新显示区域（此时的棋子已经位于新坐标上） if (tmpox boardx tmpoy boardy tmpox + CHECKERDIM boardx + BOARDDIM tmpoy + CHECKERDIM boardy + BOARDDIM) { ox = tmpox; oy = tmpoy; repaint (); } } } }); } public void paint (Graphics g) { // Paint the checkerboard over which the checker will be dragged. // 在棋子将要被拖动的位置上绘制棋盘 paintCheckerBoard (imG, boardx, boardy); // Paint the checker that will be dragged. // 绘制即将被拖动的棋子 paintChecker (imG, ox, oy); // Draw contents of image buffer. // 绘制图像缓冲的内容 g.drawImage (imBuffer, 0, 0, this); } void paintChecker (Graphics g, int x, int y) { // Set checker shadow color. // 设置棋子阴影的颜色 g.setColor (Color.black); // Paint checker shadow. // 绘制棋子的阴影 g.fillOval (x, y, CHECKERDIM, CHECKERDIM); // Set checker color. // 设置棋子颜色 g.setColor (Color.red); // Paint checker. // 绘制棋子 g.fillOval (x, y, CHECKERDIM - CHECKERDIM / 13, CHECKERDIM - CHECKERDIM / 13); } void paintCheckerBoard (Graphics g, int x, int y) { // Paint checkerboard outline. // 绘制棋盘轮廓线 g.setColor (Color.black); g.drawRect (x, y, 8 * SQUAREDIM + 1, 8 * SQUAREDIM + 1); // Paint checkerboard. // 绘制棋盘 for (int row = 0; row 8; row++) { g.setColor (((row 1) != 0) ? darkGreen : Color.white); for (int col = 0; col 8; col++) { g.fillRect (x + 1 + col * SQUAREDIM, y + 1 + row * SQUAREDIM, SQUAREDIM, SQUAREDIM); g.setColor ((g.getColor () == darkGreen) ? Color.white : darkGreen); } } } // The AWT invokes the update() method in response to the repaint() method // calls that are made as a checker is dragged. The default implementation // of this method, which is inherited from the Container class, clears the // applet's drawing area to the background color prior to calling paint(). // This clearing followed by drawing causes flicker. CheckerDrag overrides // update() to prevent the background from being cleared, which eliminates // the flicker. // AWT调用了update()方法来响应拖动棋子时所调用的repaint()方法。该方法从 // Container类继承的默认实现会在调用paint()之前，将applet的绘图区域清除 // 为背景色，这种绘制之后的清除就导致了闪烁。CheckerDrag重写了update()来 // 防止背景被清除，从而消除了闪烁。 public void update (Graphics g) { paint (g); }}