timer1

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

public class Timer extends JFrame {
	public void Timer() {
		setTitle("타이머");
		setSize(700,700);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new FlowLayout());
		JLabel timerLabel = new JLabel();
		timerLabel.setFont(new Font("Gothic",Font.ITALIC,80));
		c.add(timerLabel);
		TimerRunnable runnable = new TimerRunnable(timerLabel);
		Thread th = new Thread(runnable);
		setVisible(true);
		th.start();
	}
	public static void main(String[] args) {
		new Timer();
	}
}

class TimerRunnable implements Runnable{
	private JLabel timerLabel;
	private int n;
	public TimerRunnable(JLabel timerLabel){
		this.timerLabel=timerLabel;
	}
	public TimerRunnable(int n){
		this.n=n;
	}
	public void run() {
		while(true) {
			timerLabel.setText(Integer.toString(n));
			n--;
			try {
				Thread.sleep(1000);
				if(n==0)
					break;
				else
					continue;
			}
			catch(InterruptedException e){
				return;
			}
		}
	}
	public void panel() {
		
	}
}
public class button extends JLabel {
	public button() {
		JButton btn1 = new JButton("5초");
		JButton btn2 = new JButton("10초");
		JButton btn3 = new JButton("15초");
	btn1.addActionListener(new ActionListener() { 
		public void actionPerformed(ActionEvent e) 
		{ 	
			TimerRunnable runnable = new TimerRunnable(5);
			} 
		});
	btn2.addActionListener(new ActionListener() { 
		public void actionPerformed(ActionEvent e) 
		{TimerRunnable runnable = new TimerRunnable(10);
			} 
		});
	btn3.addActionListener(new ActionListener() { 
		public void actionPerformed(ActionEvent e) 
		{TimerRunnable runnable = new TimerRunnable(15);
			} 
		});
	this.add(btn1);	
	this.add(btn2);	
	this.add(btn3);	
}
}