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

public class TimerTest2 extends JFrame implements ActionListener{

  Timer timer;
  JLabel label;
  int sec;
  JButton startButton;
  JButton stopButton;

  public static void main(String[] args){
    TimerTest2 frame = new TimerTest2();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("ƒ^ƒCƒgƒ‹");
    frame.setVisible(true);
  }

  TimerTest2(){
    sec = 0;
    label = new JLabel();

    JPanel labelPanel = new JPanel();
    labelPanel.add(label);

    timer = new Timer(1000 , this);
    timer.setActionCommand("timer");

    startButton = new JButton("start");
    startButton.addActionListener(this);
    startButton.setActionCommand("start");

    stopButton = new JButton("stop");
    stopButton.addActionListener(this);
    stopButton.setActionCommand("stop");
    stopButton.setEnabled(false);

    JPanel buttonPanel = new JPanel();
    buttonPanel.add(startButton);
    buttonPanel.add(stopButton);

    getContentPane().add(labelPanel, BorderLayout.CENTER);
    getContentPane().add(buttonPanel, BorderLayout.PAGE_END);
  }

  public void actionPerformed(ActionEvent e){
    String cmd = e.getActionCommand();

    if (cmd.equals("start")){
      stopButton.setEnabled(true);
      startButton.setEnabled(false);

      timer.start();
    }else if (cmd.equals("stop")){
      stopButton.setEnabled(false);
      startButton.setEnabled(true);

      timer.stop();
    }else if (cmd.equals("timer")){
      label.setText(sec + " sec");
      if (sec >= 10){
        stopButton.setEnabled(false);
        startButton.setEnabled(true);

        timer.stop();
        sec = 0;
      }else{
        sec++;
      }
    }
  }