myframe.java

多线程与并发处理是程序设计好坏优劣的重要课题

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class MyFrame extends JFrame implements ActionListener {
    private final JLabel label = new JLabel("Event Dispatching Thread Sample");
    private final JButton button = new JButton("countUp");
    public MyFrame() {
        super("MyFrame");
        getContentPane().setLayout(new FlowLayout());
        getContentPane().add(label);
        getContentPane().add(button);
        button.addActionListener(this);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button) {
            countUp();
        }
    }
    private void countUp() {
        for (int i = 0; i < 10; i++) {
            System.out.println(Thread.currentThread().getName() + ":countUp:setText(" + i + ")");
            label.setText("" + i);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
            }
        }
    }
}