圆盘时钟.java

个人开发的数字助理

package Default;

/*
 * @(#)Clock.java 1.16 06/02/22
 */

import java.util.*;
import java.awt.*;
import java.applet.*;
import java.text.*;

import javax.swing.JPanel;

/**
 * Time!
 * 
 * @author Rachel Gollub
 * @modified Daniel Peek replaced circle drawing calculation, few more changes
 */
public class 圆盘时钟 extends Panel implements Runnable {
	private volatile Thread		timer;		// The thread that displays clock

	private int					lastxs, lastys, lastxm, lastym, lastxh, lastyh; // Dimensions
																				// used
																				// to
																				// draw
																				// hands

	private SimpleDateFormat	formatter;										// Formats
																				// the
																				// date
																				// displayed

	private String				lastdate;										// String
																				// to
																				// hold
																				// date
																				// displayed

	private Font				clockFaceFont;									// Font
																				// for
																				// number
																				// display
																				// on
																				// clock

	private Date				currentDate = new Date();								// Used
																				// to
																				// get
																				// date
																				// to
																				// display

	private Color				handColor;										// Color
																				// of
																				// main
																				// hands
																				// and
																				// dial

	private Color				numberColor;									// Color
																				// of
																				// second
																				// hand
																				// and
																				// numbers

	private int					xcenter	= 80, ycenter = 55;					// Center
//	----------------------------------------------------------------------------------------------------------------------------------------																		// position

	public 圆盘时钟()
		{
init();
this.start();
		}
//	----------------------------------------------------------------------------------------------------------------------------------------
	public void init() {
		int x, y;
		lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;
		formatter = new SimpleDateFormat("yyyy年MM月dd日 kk时mm分ss秒", Locale
				.getDefault());
		currentDate = new Date();
		lastdate = formatter.format(currentDate);
		clockFaceFont = new Font("Serif", Font.PLAIN, 14);
		handColor = Color.red;
		numberColor = Color.darkGray;

		resize(300, 300); // Set clock window size
	}
//	----------------------------------------------------------------------------------------------------------------------------------------
	// Paint is the main part of the program
	public void update(Graphics g) {
		int xh, yh, xm, ym, xs, ys;
		int s = 0, m = 10, h = 10;
		String today;

		currentDate = new Date();

		formatter.applyPattern("s");
		try
			{
				s = Integer.parseInt(formatter.format(currentDate));
			} catch (NumberFormatException n)
			{
				s = 0;
			}
		formatter.applyPattern("m");
		try
			{
				m = Integer.parseInt(formatter.format(currentDate));
			} catch (NumberFormatException n)
			{
				m = 10;
			}
		formatter.applyPattern("h");
		try
			{
				h = Integer.parseInt(formatter.format(currentDate));
			} catch (NumberFormatException n)
			{
				h = 10;
			}

		// Set position of the ends of the hands
		xs = (int) (Math.cos(s * Math.PI / 30 - Math.PI / 2) * 45 + xcenter);
		ys = (int) (Math.sin(s * Math.PI / 30 - Math.PI / 2) * 45 + ycenter);
		xm = (int) (Math.cos(m * Math.PI / 30 - Math.PI / 2) * 40 + xcenter);
		ym = (int) (Math.sin(m * Math.PI / 30 - Math.PI / 2) * 40 + ycenter);
		xh = (int) (Math.cos((h * 30 + m / 2) * Math.PI / 180 - Math.PI / 2) * 30 + xcenter);
		yh = (int) (Math.sin((h * 30 + m / 2) * Math.PI / 180 - Math.PI / 2) * 30 + ycenter);

		// Get the date to print at the bottom
		formatter = new SimpleDateFormat("yyyy年MM月dd日 kk时mm分ss秒", Locale
				.getDefault());
		today = formatter.format(currentDate);

		g.setFont(clockFaceFont);
		// Erase if necessary
		g.setColor(getBackground());
		if (xs != lastxs || ys != lastys)
			{
				g.drawLine(xcenter, ycenter, lastxs, lastys);
				g.drawString(lastdate, 5, 125);
			}
		if (xm != lastxm || ym != lastym)
			{
				g.drawLine(xcenter, ycenter - 1, lastxm, lastym);
				g.drawLine(xcenter - 1, ycenter, lastxm, lastym);
			}
		if (xh != lastxh || yh != lastyh)
			{
				g.drawLine(xcenter, ycenter - 1, lastxh, lastyh);
				g.drawLine(xcenter - 1, ycenter, lastxh, lastyh);
			}

		// Draw date and hands
		g.setColor(numberColor);
		g.drawString(today, 5, 125);
		g.drawLine(xcenter, ycenter, xs, ys);
		g.setColor(handColor);
		g.drawLine(xcenter, ycenter - 1, xm, ym);
		g.drawLine(xcenter - 1, ycenter, xm, ym);
		g.drawLine(xcenter, ycenter - 1, xh, yh);
		g.drawLine(xcenter - 1, ycenter, xh, yh);
		lastxs = xs;
		lastys = ys;
		lastxm = xm;
		lastym = ym;
		lastxh = xh;
		lastyh = yh;
		lastdate = today;
		currentDate = new Date();
	}
//--------------------------------------------------------------------------------------------------------------------
	public void paint(Graphics g) {
		g.setFont(clockFaceFont);
		//绘制时钟的圆圈和数字
		g.setColor(Color.ORANGE);
		g.drawArc(xcenter - 50, ycenter - 50, 100, 100, 0, 360);
		g.setColor(Color.CYAN);
		g.fillOval(xcenter-3, ycenter-3 , 6, 6);
		g.setColor(numberColor);
		g.drawString("9", xcenter - 45, ycenter + 3);
		g.drawString("3", xcenter + 40, ycenter + 3);
		g.drawString("12", xcenter - 5, ycenter - 37);
		g.drawString("6", xcenter - 3, ycenter + 45);

		// Draw date and hands
		g.setColor(numberColor);
		g.drawString(lastdate, 5, 125);
		g.drawLine(xcenter, ycenter, lastxs, lastys);
		g.setColor(handColor);
		g.drawLine(xcenter, ycenter - 1, lastxm, lastym);
		g.drawLine(xcenter - 1, ycenter, lastxm, lastym);
		g.drawLine(xcenter, ycenter - 1, lastxh, lastyh);
		g.drawLine(xcenter - 1, ycenter, lastxh, lastyh);
	}
//----------------------------------------------------------------------------------------------------------------------------------------
	public void start() {
		timer = new Thread(this);
		timer.start();
	}
//	----------------------------------------------------------------------------------------------------------------------------------------
	public void stop() {
		timer = null;
	}
//	----------------------------------------------------------------------------------------------------------------------------------------
	public void run() {
		Thread me = Thread.currentThread();
		while (timer == me)
			{
				try
					{
						Thread.currentThread().sleep(100);
					} catch (InterruptedException e)
					{
					}
				repaint();
			}
	}
//	----------------------------------------------------------------------------------------------------------------------------------------
public String getNowTime()
{
	return  new SimpleDateFormat("yyyy年MM月dd日 kk时mm分", Locale
			.getDefault()).format(currentDate);
}
}