根據點畫線java

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 1 package com.yang; 2  3 import java.awt.Color; 4 import java.awt.Graphics; 5 import java.util.ArrayList; 6 import java.util.List; 7  8 import javax.swing.JFrame; 9 import javax.swing.JPanel;10 11 public class drawlineforspline extends JFrame{12     13     private static final long serialVersionUID = 1L;14     static List <mypoint>plist;15     public static class mypoint{16         int x;17         int y;18         public mypoint(int x,int y){19             this.x=x;20             this.y=y;21         }22     }23     public drawlineforspline(){24         init();25     }26     public drawlineforspline(ArrayList plist){27         init();28         this.plist=plist;29          30     }31     private void init(){32      33         this.setTitle("drawline");34         this.setBounds(200, 200, 500, 400);35         this.setBackground(Color.white);36         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);37         this.setLocationRelativeTo(null);38         this.setVisible(true); 39         40         plist =new ArrayList();41         plist.add(new mypoint(50,80));42         plist.add(new mypoint(50,120));43         plist.add(new mypoint(80,50));44         plist.add(new mypoint(150,10));45         plist.add(new mypoint(180,80));46         plist.add(new mypoint(230,200));47         48     }49  50     51     public class Mypanel extends JPanel{     52         public void paint(Graphics g){53             mypoint fromP=new mypoint(50,80);54             mypoint toP=new mypoint(370,240);55             for(int i=0;i<plist.size()-1;i++){56                 g.drawLine(plist.get(i).x, plist.get(i).y, plist.get(i+1).x, plist.get(i+1).y);57             }58         }59     }60     61     public static void main(String[] args) {62         drawlineforspline d=new drawlineforspline();63         Mypanel myp=d.new Mypanel();64         d.add(myp);65     }66 67 }

 

根據點畫線java