Jave_clock.rar_java clock

import java.awt.*;import java.util.*;import java.awt.event.*; import java.awt.geom.*;import java.applet.*; public class clock extends Applet implements Runnable { Thread 时针=null,分针=null,秒针=null;//用来表示时针,分针和秒针的线程. //表示时针,分针,秒针端点的整型变量: int hour_a,hour_b,munite_a,munite_b,second_a,second_b; //用来获取当前时间的整型变量: int hour=0,munite=0,second=0; //用来绘制时针,分针和秒针的Grapghics对象: Graphics g_second=null,g_munite=null,g_hour=null; //用来存放表盘刻度的数组,供指针走动时使用: double point_x[]=new double[61], point_y[]=new double[61] ; //用来存放表盘刻度的数组,供绘制表盘使用: double scaled_x[]=new double[61], scaled_y[]=new double[61] ; //用来判断小程序是否重新开始的变量: int start_count=0; public void init() { g_hour=this.getGraphics(); g_hour.setColor(Color.cyan); g_second=this.getGraphics(); g_second.setColor(Color.red); g_munite=this.getGraphics(); g_munite.setColor(Color.blue); g_second.translate(200,200);//进行坐标系变换，将新坐标系原点设在(200,200)处。 g_munite.translate(200,200); g_hour.translate(200,200); point_x[0]=0;point_y[0]=-120; //各个时针十二点处的位置坐标(按新坐标系的坐标)。 scaled_x[0]=0;scaled_y[0]=-140; //十二点处的刻度位置坐标(按新坐标系的坐标)。 double jiaodu=6*Math.PI/180; //表盘分割成60分，将分割点处的坐标存放在数组中： for(int i=0;i<60;i++) { point_x[i+1]=point_x[i]*Math.cos(jiaodu)- Math.sin(jiaodu)*point_y[i]; point_y[i+1]=point_y[i]*Math.cos(jiaodu)+ point_x[i]*Math.sin(jiaodu); } point_x[60]=0;point_y[60]=-120;//十二点各个时针的位置坐标(按新坐标系的坐标)。 //表盘分割成60分，将分割点处的坐标存放在数组中： for(int i=0;i<60;i++) { scaled_x[i+1]=scaled_x[i]*Math.cos(jiaodu)- Math.sin(jiaodu)*scaled_y[i]; scaled_y[i+1]=scaled_y[i]*Math.cos(jiaodu)+ scaled_x[i]*Math.sin(jiaodu); } scaled_x[60]=0; scaled_y[60]=-140;//十二点处刻度位置坐标(按新坐标系的坐标)。 } public void start() { //每当小程序重新开始时,首先消灭线程,然后重新开始创建线程。 if(start_count>=1) {秒针.interrupt();分针.interrupt();时针.interrupt(); } 秒针=new Thread(this);分针=new Thread(this); 时针=new Thread(this); 秒针.start();分针.start();时针.start(); start_count++;if(start_count>=2) start_count=1; } public void stop() {秒针.interrupt();分针.interrupt();时针.interrupt(); } public void paint(Graphics g) { //每当小程序重新绘制自己时,重新开始创建线程： this.start(); //绘制表盘的外观: g.drawOval(50,50,300,300);//表盘的外圈。 g.translate(200,200); //绘制表盘上的小刻度和大刻度： for(int i=0;i<60;i++) { if(i%5==0) { g.setColor(Color.red); g.fillOval((int) scaled_x[i],(int) scaled_y[i],8,8); } else g.fillOval((int) scaled_x[i],(int) scaled_y[i],3,3); } } public void run() { //获取本地时间: Date date=new Date();String s=date.toString(); hour=Integer.parseInt(s.substring(11,13)); munite=Integer.parseInt(s.substring(14,16)); second=Integer.parseInt(s.substring(17,19)); if(Thread.currentThread()==秒针) { second_a=(int)point_x[second];second_b=(int)point_y[second]; g_second.drawLine(0,0,second_a,second_b); //秒针的初始位置。 g_second.drawString("秒",second_a,second_b); int i=second; while(true) //秒针开始行走,每一秒走6度. { try{秒针.sleep(1000); Color c=getBackground();g_second.setColor(c); g_second.drawLine(0,0,second_a,second_b); g_second.drawString("秒",second_a,second_b); //如果这时秒针与分针重合,恢复分针的显示: if((second_a==munite_a)&&(second_b==munite_b)) { g_munite.drawLine(0,0,munite_a,munite_b); g_munite.drawString("分",munite_a,munite_b); } //如果这时秒针与时针重合,恢复时针的显示: if((second_a==hour_a)&&(second_b==hour_b)) { g_hour.drawLine(0,0,hour_a,hour_b); g_hour.drawString("时",hour_a,hour_b); } } catch(InterruptedException e) { Color c=getBackground();g_second.setColor(c); g_second.drawLine(0,0,second_a,second_b);//用背景色清除秒针。 g_second.drawString("秒",second_a,second_b); return; } second_a=(int)point_x[(i+1)%60]; second_b=(int)point_y[(i+1)%60]; g_second.setColor(Color.red); g_second.drawLine(0,0,second_a,second_b); //绘制新的秒针。 g_second.drawString("秒",second_a,second_b); i++; } } if(Thread.currentThread()==分针) { munite_a=(int)point_x[munite];munite_b=(int)point_y[munite]; g_munite.drawLine(0,0,munite_a,munite_b);//分针的初始位置。 g_munite.drawString("分",munite_a,munite_b); int i=munite; while(true) { //第一次,过60-second秒就前进一分钟,以后每过60秒前进一分钟。 try{分针.sleep(1000*60-second*1000);second=0; Color c=getBackground();g_munite.setColor(c); g_munite.drawLine(0,0,munite_a,munite_b); g_munite.drawString("分",munite_a,munite_b); if((hour_a==munite_a)&&(hour_b==munite_b)) { g_hour.drawLine(0,0,hour_a,hour_b); g_hour.drawString("时",hour_a,hour_b); } } catch(InterruptedException e) {return; } //分针向前走一个单位: munite_a=(int)point_x[(i+1)%60]; munite_b=(int)point_y[(i+1)%60]; g_munite.setColor(Color.blue); g_munite.drawLine(0,0,munite_a,munite_b); g_munite.drawString("分",munite_a,munite_b); i++; second=0; } } if(Thread.currentThread()==时针) { int h=hour%12; hour_a=(int)point_x[h*5+munite/12]; hour_b=(int)point_y[h*5+munite/12]; int i= h*5+munite/12; g_hour.drawLine(0,0,hour_a,hour_b); g_hour.drawString("时",hour_a,hour_b); while(true) {//第一次,过12-munite%12分钟就前进一个刻度,以后每过12分钟前进一个刻度. try{ 时针.sleep(1000*60*12-1000*60*(munite%12)-second*1000);munite=0; Color c=getBackground();g_hour.setColor(c); g_hour.drawLine(0,0,hour_a,hour_b); g_hour.drawString("时",hour_a,hour_b); } catch(InterruptedException e) {return; } hour_a=(int)point_x[(i+1)%60]; hour_b=(int)point_y[(i+1)%60]; g_hour.setColor(Color.cyan); g_hour.drawLine(0,0,hour_a,hour_b); g_hour.drawString("时",hour_a,hour_b); i++; munite=0; } } } }