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Код


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class test7 {

    public static void main(String[] args) throws InterruptedException {
        jFrame frame=new jFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}
class jFrame extends JFrame
{
    public jFrame() 
    {
        label=new JLabel(str);
        
        JPanel panel=new JPanel();
        panel.setLayout(new GridLayout(2,0));
        
        JButton button=new JButton("start");
        button.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent arg0) {
                try {
                    for(int i=3;i>0;i--)
                    {
                        System.out.println(str+i);
                        label.setText(str+i);
                        Thread.sleep(1000);
                        }
                    } catch (InterruptedException e) {e.printStackTrace();}
            }});
        
        panel.add(label);
        panel.add(button);
        this.getContentPane().add(panel);
        pack();
    }
    private JLabel label;
    private String str="ggg :";
}

Код


import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class Main {
    public static void main(String[] args) throws InterruptedException {
        TimerFrame frame = new TimerFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

class TimerFrame extends JFrame implements ActionListener {
    private int numUpdated;
    private JLabel label;
    private Timer  updateTimer;
    
    TimerFrame() {
        label = new JLabel("ggg:");

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(2, 0));

        JButton button = new JButton("start");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                startUpdates();
            }
        });

        panel.add(label);
        panel.add(button);
        this.getContentPane().add(panel);
        pack();
    }
    
    private void startUpdates() {
        updateTimer = new Timer(1000, this);
        updateTimer.start();
    }

    @Override
    public void actionPerformed(ActionEvent arg0) {
        numUpdated++;

        label.setText("ggg: " + numUpdated);
        
        if (numUpdated == 3) {
            updateTimer.stop();
        }
    }
}

Код


...
button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                startUpdates();
                System.out.println("привет!!!");
            }
        });
...

Цитата(hagerds @ 10.1.2012, 00:56

)

В коде разобрался, а вот с теорией не очень понял.