timeclock.java

用Java Swing写的一个日历程序

/**
 * Clock.java
 * Summary 数字时钟主类
 * Created on 2008年5月27日, 下午3:40 
 * @author supergg
 * remark 如有改动请发一份代码给我，邮箱[e-mail]
 */
package ecgql;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.text.SimpleDateFormat;
import java.util.Calendar;

class TimeClock extends Canvas implements Runnable {

	private static final long serialVersionUID = 3660124045489727166L;

	MainFrame mf;

	Thread t;

	String time;

	public TimeClock(MainFrame mf) {
		this.mf = mf;
		setSize(140, 40);
		setBackground(Color.white);
		t = new Thread(this); // 实例化线程
		t.start(); // 调用线程
	}

	public void run() {
		while (true) {
			try {
				Thread.sleep(1000); // 休眠1秒钟
			} catch (InterruptedException e) {
				System.out.println("异常");
			}
			this.repaint(100);
		}
	}

	public void paint(Graphics g) {
		Font f = new Font("宋体", Font.BOLD, 16);
		SimpleDateFormat SDF = new SimpleDateFormat("HH:mm:ss");// 格式化时间显示类型
		Calendar now = Calendar.getInstance();
		time = SDF.format(now.getTime()); // 得到当前日期和时间
		g.setFont(f);
		g.setColor(Color.BLACK);
		g.drawString(time, 45, 25);
	}
}