java模拟舞动字符

 源代码：

import java.applet.Applet;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;public class brandishString extends Applet implements Runnable, MouseListener {String str; // 要显示的字符串char strChars[]; // 字符串的字符数组表示Thread runner = null; // 线程boolean threadSuspended; // 线程的状态int strLength; // 字符串长度static final int REGULAR_WD = 100; // 字符舞动的宽度static final int REGULAR_HT = 50; // 字符舞动的高度Font regularFont = new Font("Serif", Font.BOLD, 120); // 设置字体public void init() {// 初始化方法this.setBackground(Color.RED);this.setForeground(Color.BLACK);str = "08计本曹锋"; // 设置默认参数strLength = str.length();strChars = new char[strLength];str.getChars(0, strLength, strChars, 0); // 获取字符数组threadSuspended = false; // 用来判断线程的this.addMouseListener(this); // 当前对象自己监视自己this.setSize(1000, 500); // 设置大小}public void start() { // init()方法执行完自动执行start()方法runner = new Thread(this); // 创建一个线程runner.start(); // 启动线程}public void run() {Thread me = Thread.currentThread(); // 获取当前线程while (runner == me) { // 判断当前线程是否和runner是同一个线程try {Thread.sleep(100);synchronized (this) {// 对当前对象加锁if (threadSuspended)wait(); // 进入等待状态}} catch (InterruptedException e) {} // 不需要编写异常代码repaint(); // 刷新屏幕}}public void paint(Graphics g) {int length = strChars.length;// 求字符长度for (int i = 0, x = 0; i < length; i++) {g.setFont(regularFont); // 设置字体int px = (int) (100 * Math.random() + x);// 设置x坐标int py = (int) (300 * Math.random() + REGULAR_HT);// 设置y坐标g.drawChars(strChars, i, 1, px, py); // 输出一个字符x += REGULAR_WD;}}public synchronized void mousePressed(MouseEvent e) {threadSuspended = !threadSuspended; // 更改线程状态if (!threadSuspended)notify(); // 唤醒等待的线程}public void mouseEntered(MouseEvent e) { // 鼠标进入小程序，显示WelcomeshowStatus("Welcome");}public void mouseExited(MouseEvent e) { // 鼠标离开小程序，显示Bye...showStatus("Bye...");}// 本程序不需要下面两个方法的功能，因此方法体为空public void mouseReleased(MouseEvent e) {}public void mouseClicked(MouseEvent e) {}}

 

程序输出结果：