我看了一下，java里面的绘图
import java.awt.Graphics;
import java.swing.JApplet;
public class CircleApplet extends JApplet
{
         public void paint(Graphics s)
        {
               for(int i=0;i<=15;i++)
                         s.drawOval(250-2*i,50-2*i,30+4*i,30+4*i);         

          }
}//这个代码可以画一个圆环，我现在想知道用什么方法可以画一个正六边形，请大家各显神通

1. import java.awt.Graphics;
   
2. import java.awt.Graphics2D;
   
3. import java.awt.Shape;
   
4. import java.awt.geom.Line2D;
   
5. 
   
6. import javax.swing.JFrame;
   
7. 
   
8. public class nomain extends JFrame
   
9. {
   
10.         private static final int x=200;
    
11.         private static final int y=50;
    
12.         private static final int width=300;
    
13.         public void drawMyPic()
    
14.         {
    
15.                 this.setSize(800,600);
    
16.                 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
17.                 this.show();
    
18.         }
    
19.         public void paint(Graphics g)
    
20.         {
    
21.                 Shape l1=new Line2D.Double(x, y, x+width, y);
    
22.                 Shape l2=new Line2D.Double(x+width, y, x+width+width/2, y+(width/2)*Math.sqrt(3));
    
23.                 Shape l3=new Line2D.Double(x+width+width/2, y+(width/2)*Math.sqrt(3), x+width, y+2*((width/2)*Math.sqrt(3)));
    
24.                 Shape l4=new Line2D.Double( x+width, y+2*((width/2)*Math.sqrt(3)),  x, y+2*((width/2)*Math.sqrt(3)));
    
25.                 Shape l5=new Line2D.Double(x, y+2*((width/2)*Math.sqrt(3)),(x-width/2), y+(width/2)*Math.sqrt(3));
    
26.                 Shape l6=new Line2D.Double((x-width/2), y+(width/2)*Math.sqrt(3), x, y);
    
27.                 Graphics2D gr=(Graphics2D)g;
    
28.                 gr.draw(l1);
    
29.                 gr.draw(l2);
    
30.                 gr.draw(l3);
    
31.                 gr.draw(l4);
    
32.                 gr.draw(l5);
    
33.                 gr.draw(l6);
    
34.         }
    
35.     public static void main(String[] args)
    
36.     {
    
37.             nomain m=new nomain();
    
38.             m.drawMyPic();
    
39.         }
    
40. }

复制代码

注意这个画的是标注正六边形，如果显示不是标准正六边形很正常，就算法而言是是六边形

这是我首次写这些代码以前见都没见过，有点吃力

import javax.swing.*;
import java.awt.*;

public class DrawPolygon extends JFrame{
    public DrawPolygon(){
        setTitle("DrawPolygon");
        add(new PolygonsPanel());
    }
   
    public static void main(String [] args){
        DrawPolygon frame = new DrawPolygon();
        frame.setLocationRelativeTo(null);
        frame.setSize(400,300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}



class PolygonsPanel extends JPanel{
    protected void paintComponent(Graphics g){
        super.paintComponent(g);
    int xCenter = getWidth()/2;
    int yCenter = getHeight()/2;
    int radius = (int)(Math.min(getWidth(),getHeight())*0.4);
   
    Polygon polygon = new Polygon();
    polygon.addPoint(xCenter + radius ,yCenter);
    polygon.addPoint((int)(xCenter+radius *Math.cos(2*Math.PI/6)),(int)(yCenter-radius *Math.sin(2*Math.PI/6)));
    polygon.addPoint((int)(xCenter+radius*Math.cos(2*2*Math.PI/6)),(int)(yCenter-radius *Math.sin(2*2*Math.PI/6)) );
    polygon.addPoint((int)(xCenter+radius*Math.cos(3*2*Math.PI/6)),(int)(yCenter-radius*Math.sin(3*2*Math.PI/6)));
    polygon.addPoint((int)(xCenter+radius * Math.cos(4*2*Math.PI/6)),(int)(yCenter - radius *Math.sin(4*2*Math.PI/6)));
    polygon.addPoint((int)(xCenter+radius *Math.cos(5*2*Math.PI/6)),(int)(yCenter - radius *Math.sin(5*2*Math.PI/6)));
    g.drawPolygon(polygon);
    }
}