java时钟_表盘数字

import java.awt.BasicStroke; import java.awt.Canvas; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.util.Calendar; public class ClockPanel extends Canvas{ Calendar pcal; int x,y,x0,y0,r,h,olds_x,olds_y,oldm_x,oldm_y,oldh_x,oldh_y,ss,mm,hh,old_m,old_h,ang; final double RAD=Math.PI/180; public ClockPanel(Calendar cal) { this.pcal=cal; } public void paint(Graphics g) { Graphics2D g2D = (Graphics2D)g; g.setXORMode(this.getBackground()); h = getSize().height; g.setColor(Color.BLACK); r=h/2-30; x0=this.getWidth()/2; y0=this.getHeight()/2; ang=60; //绘制时钟上的12个数字 for(int i=1;i<=12;i++) { x=(int)((r-10)*Math.cos(RAD*ang)+x0); y=(int)((r-10)*Math.sin(RAD*ang)+y0); g.drawString(""+i,x,h-y); ang-=30; } //获得当前系统时间 //int nowh= now.get(Calendar.HOUR_OF_DAY); int nowh= this.pcal.get(Calendar.HOUR)%12; int nowm= this.pcal.get(Calendar.MINUTE); int nows= this.pcal.get(Calendar.SECOND); ss=90-nows*6; mm=90-nowm*6; hh=90-nowh*30-nowm/2; g2D.setStroke(new BasicStroke(1.0f)); if(olds_x>0) { g.setColor(getBackground()); g.drawLine(x0,y0,olds_x,h-olds_y); } else { old_m = mm; old_h = hh; } //绘制秒针 x=(int) (r*0.9*Math.cos(RAD*ss))+x0;//长度 y=(int)(r*0.9*Math.sin(RAD*ss))+y0; g.setColor(Color.black);//指针颜色 g.drawLine(x0,y0,x,h-y);//轨迹 olds_x=x; olds_y=y; g2D.setStroke(new BasicStroke(2.2f));//分针粗细 //擦除分针 if(old_m!=mm) { g.setColor(getBackground()); g.drawLine(x0,y0,oldm_x,h-oldm_y); } //绘制分针 x=(int)(r*0.7*Math.cos(RAD*mm))+x0;//长度 y=(int)(r*0.7*Math.sin(RAD*mm))+y0; g.setColor(Color.red);//颜色 g.drawLine(x0,y0,x,h-y); oldm_x=x; oldm_y=y; old_m=mm; g2D.setStroke(new BasicStroke(3.4f));//时针粗细 //擦除时针 if(old_h!=hh) { g.setColor(getBackground()); g.drawLine(x0,y0,oldh_x,h-oldh_y); } //绘制时针 x=(int)(r*0.5*Math.cos(RAD*hh))+x0;//长度 y=(int)(r*0.5*Math.sin(RAD*hh))+y0; g.setColor(Color.red);//颜色 g.drawLine(x0,y0,x,h-y); oldh_x=x; oldh_y=y; old_h=hh; } public void repaintp(Calendar cal) { this.pcal=cal; this.repaint(); } }