JAVA版随机抽人-编程知识

JAVA版随机抽人

主函数

public class Main {public static void main(String[] args) {//这里存入数据String[] data = {"土一","李二","张三","李四","乔冠宇","王五"};MyJFrame frame = new MyJFrame(data);}
}

界面类

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;public class MyJFrame extends JFrame {String[] strings;Thread thread;public MyJFrame() throws HeadlessException {JOptionPane.showMessageDialog(null,"数据未传入","数据异常",JOptionPane.ERROR_MESSAGE);}public MyJFrame(String[] strings) throws HeadlessException {this.strings = strings;this.setSize(400,400);this.setLocationRelativeTo(null);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.setResizable(false);this.setTitle("抽取幸运儿");JPanel jPanel_body = new JPanel(new GridLayout(3,1));JPanel jPanel_top = new JPanel(new GridLayout(2,1));JPanel jPanel_top_top = new JPanel();jPanel_top.add(jPanel_top_top);JPanel jPanel_top_bottom = new JPanel();JLabel jLabel = new JLabel("新的幸运儿已经产生");jLabel.setFont(new Font("宋体",Font.BOLD,20));jPanel_top_bottom.add(jLabel);jPanel_top.add(jPanel_top_bottom);JPanel jPanel_center = new JPanel();JTextField field = new JTextField(18);field.setFont(new Font("宋体",Font.PLAIN,20));jPanel_center.add(field);JPanel jPanel_bottom = new JPanel();JButton button = new JButton("暂停");button.setPreferredSize(new Dimension(80, 32));jPanel_bottom.add(button);JButton jButton = new JButton("开始随机点人");jButton.setPreferredSize(new Dimension(80, 32));jPanel_bottom.add(jButton);jButton.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {MyTask task = new MyTask(field,strings);if(thread==null){thread = new Thread(task);thread.start();}}});button.addActionListener(new AbstractAction() {@Overridepublic void actionPerformed(ActionEvent e) {if(thread!=null){thread.interrupt();thread = null;}}});jPanel_body.add(jPanel_top);jPanel_body.add(jPanel_center);jPanel_body.add(jPanel_bottom);this.add(jPanel_body);this.setVisible(true);}
}

线程类

import javax.swing.*;
import java.util.Random;public class MyTask implements Runnable{JTextField field;String[] strings;static Object object = new Object();public MyTask(JTextField field, String[] strings) {this.field = field;this.strings = strings;}@Overridepublic void run() {synchronized (object){Random random = new Random();while (true){int index = random.nextInt(strings.length);field.setText(strings[index]);}}}
}