分享一个最近作的一个用swing作的小程序，相似于打砖块。单击开始，单击暂停，再次单击继续游戏，鼠标离开窗口暂停。鼠标移动控制挡板，小球落到挡板上反弹，落到底部生命值扣一，每击中一个成绩加一。初学者能够写一写，就当作一个小练习。java
第一个类：窗口类，用JFrame画的窗口。小程序
import javax.swing.JFrame;
public class BallJframe {
// 建立一个窗体对象
JFrame frame = new JFrame();
// 自定义方法为窗体设置属性
public void init() {
// 设置标题
frame.setTitle("打弹珠");
// 设置窗体大小、位置
frame.setBounds(200, 100, 800, 600);
// 设置默认关闭方式
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 建立画布对象
BallJpanel jp = new BallJpanel();
// 将画布类对象添加到窗体中
frame.add(jp);
// 设置窗口可见
frame.setVisible(true);
}
public static void main(String[] args) {
BallJframe bf = new BallJframe();
bf.init();
}
}
第二个类：面板类，用线程与鼠标监听器来实现功能。
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JPanel;
public class BallJpanel extends JPanel implements MouseMotionListener,
MouseListener {
// 定义挡板的坐标
static int dx = 200, dy = 550;
//成绩
static int score = 0;
//球速
static int n=10;
//生命值
static int hp=n;
//游戏速度
int speed = 5;
//开始状态
static final int START = 0;
//运行状态
static final int RUNNING = 1;
//暂停状态
static final int PASS = 2;
//结束状态
static final int OVER=3;
//当前的运动状态
int state = START;
//建立List集合存储Ball类
List<Ball> list = new ArrayList<Ball>();
public BallJpanel() {
// 添加小球类
for(int i=0;i<hp;i++){
Ball ball = new Ball();
list.add(ball);
}
move();
addMouseMotionListener(this);
addMouseListener(this);
}
public void paint(Graphics g) {
super.paint(g);
//设置背景颜色
setBackground(Color.black);
//画出挡板
g.setColor(Color.orange);
g.fillRect(dx, dy, 100, 20);
// 画出小球
for(int i=0;i<list.size();i++){
Ball ball = list.get(i);
g.setColor(Color.white);
g.fillOval(ball.getX(), ball.getY(), 2 * ball.getR(), 2 * ball.getR());
}
//在屏幕上显示成绩与生命值
g.drawString("成绩：" + score, 20, 20);
g.drawString("生命值："+hp, 20, 40);
//开始时重置成绩、生命值与速度,屏幕上显示游戏开始
if(state==START){
score=0;
hp=n;
speed=5;
g.setColor(Color.red);
g.setFont(new Font("微软雅黑",Font.PLAIN,40));
g.drawString("游戏开始",300,250);
}
//暂停时屏幕上显示游戏暂停
if(state==PASS){
g.setColor(Color.red);
g.setFont(new Font("微软雅黑",Font.PLAIN,40));
g.drawString("游戏暂停",300,250);
}
//生命值为0时游戏结束,屏幕上显示游戏结束
if(hp==0){
state=OVER;
g.setColor(Color.red);
g.setFont(new Font("微软雅黑",Font.PLAIN,40));
g.drawString("游戏结束",300,250);
}
//根据成绩调整速度
if (score >= 40) {
speed = 4;
}
if (score >= 60) {
speed = 3;
}
if (score >= 80) {
speed = 2;
}
if (score >= 100) {
speed = 1;
}
}
public void move() {
new Thread() {
public void run() {
while (true) {
//当运行时
if (state == RUNNING) {
for(int i=0;i<list.size();i++){
Ball ball = list.get(i);
// 调用ballMove方法让小球动起来
ball.ballMove();
ball.ballBorder();
// 小球碰撞
for(int j=i+1;j<list.size();j++){
Ball ball2 = list.get(j);
ball.ballCrash(ball2);
}
}
} else if (state == START) {
//开始时将挡板移到屏幕中间
dx = 350;
} else {
//暂停
}
// 重绘
repaint();
try {
Thread.sleep(speed);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}.start();
}
@Override
public void mouseDragged(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseMoved(MouseEvent e) {
// TODO Auto-generated method stub
//当运行时挡板跟着鼠标移动
if (state == RUNNING) {
dx = e.getX() - 100 / 2;
if (dx <= 0) {
dx = 0;
}
if (dx >= 800 - 116) {
dx = 684;
}
repaint();
}
}
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
//开始时单击鼠标运行 运行时单击鼠标暂停 暂停时单击鼠标运行
if (state == START) {
state = RUNNING;
} else if (state == RUNNING) {
state = PASS;
} else if(state==PASS){
state = RUNNING;
}else if(state==OVER){
state=START;
//重置小球的坐标
for(int i=0;i<list.size();i++){
Ball ball = list.get(i);
ball.reset();
}
}
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
//鼠标进入窗口暂停变运行
if (state == PASS) {
state = RUNNING;
}
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
//鼠标离开窗口运行变暂停
if (state == RUNNING) {
state = PASS;
}
}
}
public class Ball {
// 定义小球的运动方向
public static final int LEFT_UP = 0;
public static final int LEFT_DOWN = 1;
public static final int RIGHT_UP = 2;
public static final int RIGHT_DOWN = 3;
// 定义小球当前的运动方向
private int f = LEFT_UP;
// 定义小球的坐标
private int x, y;
// 定义小球的半径
private int r;
public Ball() {
x = (int) (Math.random() * 800);
y = (int) (Math.random() * 400);
r = 10;
int ran = (int) (Math.random() * 2);
if (ran == 0) {
f = LEFT_UP;
} else if (ran == 1) {
f = RIGHT_UP;
}
}
public Ball(int x, int y, int r, int f) {
super();
this.x = x;
this.y = y;
this.r = r;
this.f = f;
}
public int getF() {
return f;
}
public void setF(int f) {
this.f = f;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public int getR() {
return r;
}
public void setR(int r) {
this.r = r;
}
//小球移动
public void ballMove() {
if (f == LEFT_UP) {
x--;
y--;
}
if (f == LEFT_DOWN) {
x--;
y++;
}
if (f == RIGHT_UP) {
x++;
y--;
}
if (f == RIGHT_DOWN) {
x++;
y++;
}
}
// 小球越界处理
public void ballBorder() {
if (y <= 0) {
if (f == LEFT_UP) {
f = LEFT_DOWN;
}
if (f == RIGHT_UP) {
f = RIGHT_DOWN;
}
}
if (x <= 0) {
if (f == LEFT_UP) {
f = RIGHT_UP;
}
if (f == LEFT_DOWN) {
f = RIGHT_DOWN;
}
}
// 小球碰到挡板
if (y >= BallJpanel.dy - 2 * r) {
if (x >= BallJpanel.dx && x <= BallJpanel.dx + 100) {
if (f == LEFT_DOWN) {
f = LEFT_UP;
}
if (f == RIGHT_DOWN) {
f = RIGHT_UP;
}
y-=3;
BallJpanel.score++;
} else if (y == 600 - 2 * r - 40) {
BallJpanel.hp--;
} else if (y > 600 - 2 * r - 40) {
x = 900;
y = 900;
}
}
if (x >= 800 - 2 * r - 15) {
if (f == RIGHT_UP) {
f = LEFT_UP;
}
if (f == RIGHT_DOWN) {
f = LEFT_DOWN;
}
}
}
//小球碰撞检测
public boolean isCrash(Ball ball){
int lx = Math.abs(x+r-(ball.x+ball.r));
int ly = Math.abs(y+r-(ball.y+ball.r));
boolean h = lx<=(r+ball.r)&&ly<=(r+ball.r);
return h;
}
//小球碰撞反弹
public void ballCrash(Ball another) {
if(isCrash(another)){
x++;
y++;
int temp = this.f;
this.f = another.f;
another.f = temp;
}
}
// 重置小球的位置
public void reset() {
x = (int) (Math.random() * 800);
y = (int) (Math.random() * 500);
int ran = (int) (Math.random() * 2);
if (ran == 0) {
f = LEFT_UP;
} else if (ran == 1) {
f = RIGHT_UP;
}
}
}