基于java swing的指针时钟

import java.awt.BasicStroke; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Point; import java.util.Calendar; public class DrawClock { public void drawSelfClock(Clock clock,Graphics g){ Calendar cal=Calendar.getInstance(); int hour=cal.get(Calendar.HOUR); int minute= cal.get(Calendar.MINUTE); int second= cal.get(Calendar.SECOND); int width =clock.getWidth(); int height=clock.getHeight(); int small= width<height ? width: height; int diameter =(int) (small*0.8); int radius=diameter/2; Point center =new Point(width/2,height/2); int secondLength=(int) (radius*0.8); int minuteLength=(int)(secondLength*0.8); int hourLength=(int)(minuteLength*0.8); int secondX =center.x+ (int) (secondLength*Math.sin(second*2*Math.PI/60.0)); int secondY =center.y- (int) (secondLength*Math.cos(second*2*Math.PI/60.0)); int minuteX =center.x+ (int) ( minuteLength*Math.sin(minute*2*Math.PI/60.0)); int minuteY =center.y- (int) ( minuteLength*Math.cos(minute*2*Math.PI/60.0)); int hourX =center.x+ (int) (hourLength*Math.sin((minute/60.0+hour)*Math.PI/6.0)); int hourY =center.y-(int) (hourLength*Math.cos((minute/60.0+hour)*Math.PI/6.0)); Graphics2D g2d=(Graphics2D) g; g.drawOval(center.x-radius, center.y-radius, diameter, diameter); for (int i=0;i<60;i++){ int x2=center.x+(int)(radius*Math.sin(i*2*Math.PI/60)); int y2=center.x-(int)(radius*Math.cos(i*2*Math.PI/60)); if (i%5==0){ int x1=center.x+(int) ((secondLength+1)*Math.sin(i*2*Math.PI/60.0)); int y1=center.y-(int) ((secondLength+1)*Math.cos(i*2*Math.PI/60.0)); g2d.setStroke(new BasicStroke(2.5f)); g2d.drawLine(x1, y1, x2, y2); int sj=i/5; if(sj==0){ sj=12; } g2d.drawString(String.valueOf(sj ),x2, y2); } else { int x1=center.x+(int) ((secondLength+10)*Math.sin(i*2*Math.PI/60.0)); int y1=center.y-(int) ((secondLength+10)*Math.cos(i*2*Math.PI/60.0)); g2d.setStroke(new BasicStroke(0.8f)); g2d.drawLine(x1, y1, x2, y2); } } g2d.setColor(Color.RED); g2d.setStroke(new BasicStroke(3.0f)); g2d.drawLine(center.x, center.y, hourX, hourY); g2d.setColor(Color.BLUE); g2d.setStroke(new BasicStroke(1.5f)); g2d.drawLine(center.x, center.y, minuteX, minuteY); g2d.setColor(Color.BLACK); g2d.setStroke(new BasicStroke(1.0f)); g2d.drawLine(center.x, center.y, secondX, secondY); } }