clock.java~3~

园形时针显示

package untitled1;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class clock extends Applet implements Runnable{
  Thread timer = null;
  int lastXSecond = 0;
  int lastYSecond = 0;
  int lastXMinute = 0;
  int lastYMinute = 0;
  int lastXHour = 0;
  int lastYHour = 0;
  int xCenter = 100;
  int yCenter = 100;
  int radius = 80;
  int xToday = 45;
  int yToday = 220;
  boolean isStandalone = false;
  /**Get a parameter value*/
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  /**Construct the applet*/
  public clock() {
  }
  /**Initialize the applet*/
  public void init() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  /**Component initialization*/
  private void jbInit() throws Exception {
  }
  /**Get Applet information*/
  public String getAppletInfo() {
    return "Applet Information";
  }
  /**Get parameter info*/
  public String[][] getParameterInfo() {
    return null;
  }
  public void paint(Graphics g){
      int xHour,yHour,xMinute,yMinute,xSecond,ySecond,second,minute,hour;
      String today;

      drawScale(g);
      Date date = new Date();
      second = date.getSeconds();
      minute = date.getMinute();
      hour = date.getHour();
      today = date.toLocaleString;

      xSecond = (int)(Math.cos(second *3.14f/30 - 3.14f/2)*radius+xCenter);
      ySecond = (int)(Math.sin(second *3.14f/30 - 3.14f/2)*radius+yCenter);
      xMinute =  (int)(Math.cos(minute *3.14f/30 - 3.14f/2)*(radius-5)+xCenter);
      yMinute =  (int)(Math.sin(minute *3.14f/30 - 3.14f/2)*(radius-5)+yCenter);
      xHour = (int)(Math.cos((hour*30+minut/2)*3.14f/180-3.14f/2)*(radius-15)+xCenter);
      yHour = (int)(Math.sin((hour*30+minut/2)*3.14f/180-3.14f/2)*(radius-15)+yCenter);

      if (xSecond != lastXSecond ||ySecond != lastYSecond){
          g.drawLine(xCenter,yCenter,lastXSecond,lastYSecond);
          g.drawString(lastDate,xToday,yToday);
      }
      if (xMinute!=lastXMinute || yMinute != lastYMinute){
         g.drawLine(xCenter,yCenter-1,lastXMinute,lastYMinute) ;
         g.drawLine(xCenter-1,yCenter,lastXMinute,lastYMinute) ;
      }
      if (xHour != lastXHour||yHour != lastYHour){
        g.drawLine(xCenter,yCenter-1,lastXHour,lastYHour);
        g.drawLine(xCentter-1,yCenter,lastXHour,lastYHour);
      }

      g.setColor(Color.blue);
      g.drawString(today,xToday,yToday);

      g.setColor(Color.pink);
      g.drawLine(xCenter,yCenter,xSecond,ySecond) ;

      g.setColor(Color.orange) ;
      g.drawLine(xCenter,yCenter-1,xMinute,yMinute);
      g.drawLine(xCenter-1,yCenter,xMinute,yMonute);

      g.setColor(Color.green);
      g.drawLine(xCenter,yCenter-1,xHour,yHour);
      g.drawLine(xCenter-1,yCenter,xHour,yHour);

      lastXSecond = xSecond;
      lastYSecond = ySecond;
      lastXMinute = xMinute;
      lastYMinute = yMinute;
      lastXHour = xHour;
      lastYHour = yHour;
      lastDate = today;
  }
  public void drawScale(Graphics g){
      int xHour,yHour,xMinute,yMinute;
      g.setColor(Color.darkGray);
      for (int i = 0;i<12;i++){
         xHour = (int)(Math.cos((i*30)*3.14f/180-3.14f/2)*radius+xCenter);
         yHour = (int)(Math.sin((i*30)*3.14f/180 - 3.14f/2)*radius+yCenter);
         g.draw3DRect(xHour - 2,yHour - 2,4,4,true);
      }

      g.setColor(Color.gray);
      for (int j = 0;j<60;j++){
         xMinute = (int)(Math.cos(j*3.14f/30-3.14f/2)*radius + xCenter);
         yMinute = (int)(Math.sin(j*3.14f/30-3.14f/2)*radius + yCenter);
         g.draw3DRect(xMinute-1,yMinute-1,2,2,true);
      }
  }

  public void start(){
    if(timet == null){
       timer = new Thread(this);
       timer.start() ;
    }
  }

  public void stop(){
     timer = null;
  }

  public void run(){
     while (timer != null){
         try {
            Thread.sleep(100);
         }
        catch (InterruptedException e){}
      }
  }

}