colordisc.java

使用绘制圆弧的方法

import java.awt.*;
import java.applet.Applet;
public class ColorDisc extends Applet 
{
  double Data[]={23.5,56.7,33.5,77.8,33.0};
  Color color[]={Color.green,Color.blue,Color.yellow,Color.magenta,Color.orange};
  int degree[]=new int[5];
  public void init()
  {
     resize(300,150);
     double sum=0;
     for(int i=0;i<Data.length;i++)
         sum+=Data[i];
     for(int i=0;i<Data.length;i++)
     {
         degree[i]=(int)(Data[i]/sum*360+0.5);
         System.out.println(""+Data[i]+""+degree[i]);
      }
   }
public void paint(Graphics g)
{
   int x0=60,y0=70,r=50,start=0;
   for(int i=0;i<Data.length;i++)
   {
      g.setColor(color[i]);
      g.fillArc(x0-r,y0-r,2*r,2*r,start,degree[i]);
      start+=degree[i];
      System.out.println(""+degree[i]+" "+start);
   }
   g.setColor(Color.red);
   g.drawOval(x0-r,y0-r,2*r,2*r);
   for(int i=0;i<9;i++)
   {
      g.fillArc(130,40,150,80,22+i*15,15);
      i++;
      if(i==9)break;
      g.drawArc(130,40,150,80,22+i*15,15);
     }
   }
}