[Java] Thread를 이용한 타이머 + GUI

실행영상

바가 줄어드는 타이머와 숫자가 줄어드는 두 가지의 타이머입니다.

class TimerBar extends JLabel implements Runnable {
	int width = 450, height = 50;
	int x = 10, y = 50;
	Color color = new Color(255, 0, 0);
	
	int second;

	public TimerBar(int second) {
		setBackground(color);
		setOpaque(true);
		setBounds(x, y, width, height);
		
		this.second = second;
	}

	@Override
	public void run() {
		while (true) {
			try {
				Thread.sleep(1000 / (width / second));
			} catch (Exception e) {
				e.printStackTrace();
			}

			if (getWidth() > 0) {
				width -= 1;	// 너비가 1씩 줄어듦
				//System.out.println(width);
				setBounds(x, y, width, height);
			} else {
				//System.out.println("종료");
				break;
			}
		}
	}
}

TimerBar 클래스

 

class TimerNum extends JLabel implements Runnable {
	int width = 75, height = 75;
	int x = 200, y = 150;
	
	int second;

	public TimerNum(int second) {
		setOpaque(true);
		setBounds(x, y, width, height);
		setForeground(Color.BLUE);
		setText(second + "");
		setFont(new Font("맑은고딕", Font.PLAIN, 50));
		setHorizontalAlignment(JLabel.CENTER);
		
		this.second = second;
	}

	@Override
	public void run() {
		while (true) {
			try {
				Thread.sleep(1000);	// 1초
			} catch (Exception e) {
				e.printStackTrace();
			}

			if (second > 0) {
				second -= 1;		// 1초씩 줄어듦
				setText(second + "");
			} else {
				//System.out.println("종료");
				break;
			}
		}
	}
}

TimerNum 클래스

 

public class TimerTest extends JFrame {
	private JPanel panel;
	
	private TimerBar timerBar;
	private Thread threadBar;
	
	private TimerNum timerNum;
	private Thread threadNum;
	
	public TimerTest() {
		int second = 15;		// 초
		
		panel = new JPanel();
		panel.setLayout(null);
		
		timerBar = new TimerBar(second);
		threadBar = new Thread(timerBar);
		threadBar.start();
		panel.add(timerBar);
		
		timerNum = new TimerNum(second);
		threadNum = new Thread(timerNum);
		threadNum.start();
		panel.add(timerNum);
		
		add(panel);
		setTitle("타이머");
		setSize(470, 300);
		setVisible(true);
		setResizable(false);
		setLocationRelativeTo(null);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	public static void main(String[] args) {
		new TimerTest();
	}
}

TimerTest 클래스