应用--时钟

[java]代码库

package s0402模拟时钟;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.swing.JFrame;
import 工具类.ThreadSleep;

public class Copy extends JFrame implements Runnable {

	final int Xpoint = 180;
	final int Ypoint = 180;
	final int R = 80;
	int xHour = 0, yHour = 0, xSecond = 0, ySecond = 0, xMin = 0, yMin = 0;

	public Copy() {

		setFont(new Font("仿宋体", Font.BOLD, 24)); // 设置时钟的显示字体
		new Thread(this).start();
		setLocationRelativeTo(null); // 设置窗体出现位置居中
		setSize(360, 360); // 设置窗口尺寸
		setVisible(true); // 窗口可视
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 关闭窗口时退出程序
	}

	public void run() {
		while (true) {
			repaint(); // 调用paint方法重绘界面
			ThreadSleep.threadSleep(1000);
		}
	}

	public void paint(Graphics g) {

		Calendar now = Calendar.getInstance(); // 实例化日历对象
		now.setTime(new Date());// new Date()为获取当前系统时间

		// 得到具体的时间,以string 格式保存在timeInfo中************************
		int hour = now.get(Calendar.HOUR_OF_DAY); // 得到小时数
		int minute = now.get(Calendar.MINUTE); // 得到分数
		int second = now.get(Calendar.SECOND); // 得到秒数

	   String date=new SimpleDateFormat("yyyy年mm月dd日").format(new Date());//得到日期,保存在date中
	   String time=new SimpleDateFormat("hh:mm:ss").format(new Date()); //得到时间,保存在time中
	   

		// 得到具体的时间,以string 格式保存在timeInfo中************************

		g.setColor(Color.WHITE); // 设置当前颜色为白色,为了让黑点显示出来
		g.fillRect(0, 0, this.getWidth(), this.getHeight()); // 填充背景色为白色,相当于线程启动一次填充一次，才不会让上次所执行的操作留下残余

		g.setColor(Color.green); // 设置当前时间颜色为绿色

		g.drawString(date,20, 60);// 显示年月日字符串
		g.drawString(time, 130, 340); // 显示时分秒字符串

		// 画出时钟界面
		for (int i = 0, num = 0; i < 360; i += 6)// i为度数,每一秒有6°
		{
			double alfa = Math.toRadians(i); // 获得弧度数
			int xPos = Xpoint + (int) (R * Math.sin(alfa));
			int yPos = Ypoint - (int) (R * Math.cos(alfa));

			if (i % 90 == 0) {
				if (num == 0) {
					num = 12;
					g.setColor(Color.RED);
					g.drawString("" + num, xPos - 5, yPos + 3);
					num = 3;
				} else if (num == 3) {
					g.setColor(Color.BLUE);
					g.drawString("" + num, xPos - 5, yPos + 3);
					num = 6;
				} else if (num == 6) {
					g.setColor(Color.GRAY);
					g.drawString("" + num, xPos - 5, yPos + 3);
					num = 9;
				} else {
					g.setColor(Color.MAGENTA);
					g.drawString("" + num, xPos - 5, yPos + 3);
				}

			} else {
				g.setColor(Color.GRAY);
				g.drawString(".", xPos, yPos);
			}
		}

		g.setColor(Color.black);
		g.fillOval(Xpoint - 4, Ypoint - 4, 8, 8);
		// 画秒针
		xSecond = (int) (Xpoint + (R - 10)
				* Math.sin(second * (2 * Math.PI / 60)));
		ySecond = (int) (Ypoint - (R - 10)
				* Math.cos(second * (2 * Math.PI / 60)));
		g.setColor(Color.red);
		g.drawLine(Xpoint, Ypoint, xSecond, ySecond);
		// 画分针
		xMin = (int) (Xpoint + (R - 35)
				* Math.sin((minute + second / 60) * (2 * Math.PI / 60)));
		yMin = (int) (Ypoint - (R - 35)
				* Math.cos((minute + second / 60) * (2 * Math.PI / 60)));
		g.setColor(Color.BLUE);
		g.drawLine(Xpoint, Ypoint, xMin, yMin);
		// 画时针
		xHour = (int) (Xpoint + (R - 50)
				* Math.sin((hour + minute / 60 + second / 60 / 60)
						* (2 * Math.PI / 12)));
		yHour = (int) (Ypoint - (R - 50)
				* Math.cos((hour + minute / 60 + second / 60 / 60)
						* (2 * Math.PI / 12)));
		g.setColor(Color.BLACK);
		g.drawLine(Xpoint, Ypoint, xHour, yHour);
	}

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