BallTest学生练习模板(2023-09-28 1228).zip

import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.Timer; import javax.swing.JButton; import javax.swing.JFrame; public class BallTest { public static void main(String[] args) { Ball1 ball = new Ball1(); ball.init(); } } class Ball1 { private JFrame fTable; // 桌面大小 private final int TABLE_WIDTH = 300; private final int TABLE_HEIGHT = 400; // 球拍的垂直位置 private final int BALL_START_X = 50; private final int BALL_START_Y = 50; // 球大小 private final int BALL_SIZE = 30; // 小球纵向运行速度 private int xSpeed = 3; private int ySpeed = 5; // 小球初始方向 private int xDirection = 1; private int yDirection = 1; private Timer timer; public void init() { // 设置窗体大小 fTable = new JFrame("小球碰撞"); fTable.setSize(TABLE_WIDTH, TABLE_HEIGHT); // 创建按钮对象 JButton b = new JButton(); b.setSize(BALL_SIZE, BALL_SIZE); b.setLocation(BALL_START_X, BALL_START_Y); // 按钮点击事件 b.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub System.out.println("点击按钮"); if(timer.isRunning()) { timer.stop(); }else { timer.start(); } } }); // Timer事件 ActionListener taskPerformer = new ActionListener() { @Override public void actionPerformed(ActionEvent e) { } }; timer = new Timer(50, taskPerformer); // 采用了null布局 fTable.setLayout(null); // 把按钮添加到窗体上 fTable.add(b); // 设置窗体可见 fTable.setVisible(true); } }