Форум программистов [Powered by Invision Power Board]

Код

import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.util.Date;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;


public class ButtonTimer extends JFrame implements Runnable {
    
    private JLabel lblTime = null;
    private JButton btnTime = null;
    
    public static final void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new ButtonTimer();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
    
    public ButtonTimer() {
        setTitle("Time Button");
        setLayout(new FlowLayout());
        lblTime = new JLabel("Time: ");
        btnTime = new JButton(new Date(System.currentTimeMillis()).toString());
        add(lblTime);
        add(btnTime);
        pack();
        Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(this, 1000, 1000, TimeUnit.MILLISECONDS);
        
    }
    
    public void run() {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                btnTime.setText(new Date(System.currentTimeMillis()).toString());
            }
        });
    }
}