[자바] Thread

1. Thread를 상속받아 1초 단위 타이머 스레드 만들기

package hello;
import java.awt.*;
import javax.swing.*;

class TimerThread extends Thread {
	private JLabel timerLabel;
	public TimerThread(JLabel timerLabel) {
		this.timerLabel = timerLabel;
	}
	public void run() {
		int n=0, min=0;
		while(true) {
			//timerLabel.setText(Integer.toString(n));
			String str = String.format("%02d:%02d",n, min);
			timerLabel.setText(str);
			 
			min++;
			if(min == 60) {
				min=0;
				n++;
			}
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				return;
			}
		}
	}
}
public class TimerThreadEx  extends JFrame {
	public TimerThreadEx() {
		setTitle("Thread를 상속받은 타이머 스레드 예제");
		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);
		
		TimerThread th = new TimerThread(timerLabel);
		setSize(250,150);
		setVisible(true);
		th.start();
		
	}
	public static void main(String[] args) {
		new TimerThreadEx();
	}
}

package hello;

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

class TimerRunnable implements Runnable {
	private JLabel timerLabel;
	
	public TimerRunnable(JLabel timerJLabel) {
		this.timerLabel = timerJLabel;
	}

	@Override
	public void run() {
		int n=0;
		while(true) {
			timerLabel.setText(Integer.toString(n));
			n++;
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				return;
			}
		}
	}
}
public class ThreadInterruptEx extends JFrame{
	private Thread th;
	public ThreadInterruptEx() {
		setTitle("threadInterruptEx에제");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new FlowLayout());
		
		JLabel timerLabel = new JLabel();
		timerLabel.setFont(new Font("Gothic", Font.ITALIC, 80));
		
		TimerRunnable runnable =  new TimerRunnable(timerLabel);
		th = new Thread(runnable);
		c.add(timerLabel);
		
		JButton btn = new JButton("kill timer");
		btn.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				th.interrupt();
				JButton btn = (JButton)e.getSource();
				btn.setEnabled(false);
			}
		});
		c.add(btn);
		setSize(300,170);
		setVisible(true);
		
		th.start();
	}
	public static void main(String[] args) {
		new ThreadInterruptEx();
	}
	
}