java实现抽奖效果

来源：互联网发布：淘宝网牛仔女装编辑：程序博客网时间：2024/06/05 04:14
先上图，看看效果,
点击run时设定的文字会一直随机跳动，点击stop停止，并显示当前的文字
package com.diego.main.test;import java.awt.TextField;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Random;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JTextArea;import javax.swing.JTextField;public class RandomName // implements extends Thread        implements ActionListener, Runnable {    // 設置一個標記    private boolean flag = false;    private JFrame randomFrame = new JFrame("隨機獲取名字");    // 创建一个Panel对象。    private JPanel randomPanel = new JPanel();    private TextField tf = new TextField(30);    private JButton randomButton1 = new JButton("Run");    private JButton randomButton2 = new JButton("Stop");    private String[] name = { "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven",            "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };    public RandomName() {        // 向JPanel容器中添加三个组件        randomPanel.add(tf);        randomPanel.add(randomButton1);        randomPanel.add(randomButton2);        randomFrame.add(randomPanel);        // 取得屏幕的宽度        int width = Toolkit.getDefaultToolkit().getScreenSize().width;        // 取得屏幕的高度        int height = Toolkit.getDefaultToolkit().getScreenSize().height;        // 设置组件不可改变大小        randomFrame.setResizable(false);        // 设置关闭窗体时结束程序        randomFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        // 设置组件大小        randomFrame.setSize(250, 120);        // 设置组件位置        randomFrame.setLocation((width - 250) / 2, (height - 120) / 2);        // 设置组件大小和位置        // randomFrame.setBounds(30, 30, 250, 120);        // 设置组件可见        randomFrame.setVisible(true);        addListener();    }    private void addListener() {        randomButton1.addActionListener(this);        randomButton2.addActionListener(this);    }    @Override    public void actionPerformed(ActionEvent e) {        // TODO Auto-generated method stub        Object obj = e.getSource();        if (obj == randomButton1) {            synchronized (this) {                notify();                flag = true;            }        }        if (obj == randomButton2) {            synchronized (this) {                flag = false;            }        }    }    public void run() {        int length = name.length;        while (true) {            try {                if (!flag) {                    synchronized (this) {                        this.wait();                    }                }                Random myRandomName = new Random();                int RN = myRandomName.nextInt(length);                tf.setText(name[RN]);                Thread.sleep(1);            } catch (InterruptedException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }    public static void main(String[] args) {        RandomName rn = new RandomName();        Thread t1 = new Thread(rn);        t1.start();    }}
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