shapedemo5.java

java 完全探索的随书源码

// ShapeDemo5.java

import java.awt.*;
import java.awt.geom.*;

public class ShapeDemo5 extends java.applet.Applet
{
   public void paint (Graphics g)
   {
      Graphics2D g2 = (Graphics2D) g;

      int w = getSize ().width - 1;
      int h = getSize ().height - 1;

      for (int i = 0; i < 12; i++)
      {
           double angle = Math.PI / 2 - i * Math.PI / 6;
           double x = Math.cos (angle);
           double y = Math.sin (angle);

           Line2D l = new Line2D.Double (100 + 55.0 * x,
                                         100 - 55.0 * y,
                                         100 + 65.0 * x,
                                         100 - 65.0 * y);

           g2.draw (l);
      }
   }
}