匿名用戶

1級

2016-11-24 回答

很簡單，我給你寫一個Demo：

import java.awt.event.*;

import javax.swing.*;

public class Demo extends Thread {

private JFrame frm = new JFrame("Demo");

private JButton btnPause = new JButton("Pause");

private JLabel lblTest = new JLabel("0");

private boolean isPaused = false;

private int seconds = 0;

public void run () {

while (true) {

while (isPaused);

seconds ++;

lblTest.setText(seconds + "");

try {

sleep(200);

} catch (InterruptedException ie) {}

}

}

public Demo () {

frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frm.setResizable(false);

frm.setLayout(null);

frm.setSize(150, 200);

frm.setLocationRelativeTo(null);

lblTest.setBounds(20, 50, 100, 25);

btnPause.setBounds(20, 120, 100, 30);

btnPause.addActionListener(new ActionListener() {

public void actionPerformed (ActionEvent ae) {

if (isPaused) {

btnPause.setText("Pause");

isPaused = false;

} else {

btnPause.setText("Resume");

isPaused = true;

}

}

});

frm.add(lblTest);

frm.add(btnPause);

frm.setVisible(true);

start();

}

public static void main (String args[]) {

new Demo();

}

}