Java 窗口 绘制图形 #1

写在前面：

　　editplus换成eclipse了

　　Sketchpad要钱，买不起

　　自己搞(rua)

by emeralddarkness

　　建立了一个平面直角坐标系

　　两个变元x，y，参数i

　　实现了以下功能：

　　　　调节窗口大小

　　　　放缩单位长度

　　　　改变原点位置

　　　　改变参数方程

　　离超过Sketchpad还有十万八千里路要走呃呃呃

　　运行效果：

1     static double ponyX(double i){
2         return 4*Math.sin(i);
3     }
4     static double ponyY(double i){
5         return 6*Math.cos(i);
6     }

1     static double ponyX(double i){
2         return 4/Math.cos(i);
3     }
4     static double ponyY(double i){
5         return 6*Math.tan(i);
6     }

1     static double ponyX(double i){
2         return i;
3     }
4     static double ponyY(double i){
5         return i*i-i*4+2;
6     }

1     static double ponyX(double i){
2         return i;
3     }
4     static double ponyY(double i){
5         return i*4+5;
6     }

1     static double ponyX(double i){
2         return 4*Math.sin(i)+2;
3     }
4     static double ponyY(double i){
5         return 4*Math.cos(i)+3;
6     }

　　还能画出来各种奇奇怪怪的图形，比如说胡子

代码如下：

 1 import java.awt.*;
 2 import java.awt.event.*;
 3 import java.awt.Graphics;
 4 import java.io.*;
 5 import java.util.*;
 6 import javax.swing.ImageIcon;
 7 import javax.swing.JFrame;
 8 import javax.swing.JPanel;
 9
10 public class PonysAlgorithm extends JFrame
11 {
12     static int winX=800,winY=600;
13     static int ponyIE=30;
14     static int zeroX=winX/2,zeroY=winY/2;
15     static int ponyPrecision=100;
16
17     static double ponyX(double i){
18         return 4*Math.sin(i)+2;
19     }
20     static double ponyY(double i){
21         return 4*Math.cos(i)+3;
22     }
23
24     public static void main(String[] args) throws Exception
25     {
26         JFrame ponyFrame=new JFrame("Pony's Algorithm");
27         ponyFrame.setLayout(null);
28         JPanel ponyJPanel=new JPanel(){
29             public void paint(Graphics g){
30                 super.paint(g);
31
32                 g.setColor(Color.GRAY);
33                 /*Coordinate Axis*/
34                 g.drawLine(zeroX, 0, zeroX, winY);
35                 g.drawLine(0, zeroY, winX, zeroY);
36
37                 for(int i=zeroX+ponyIE;i<=winX;i+=ponyIE)
38                     g.drawLine(i, zeroY-5, i, zeroY+5);
39                 for(int i=zeroX-ponyIE;i>0;i-=ponyIE)
40                     g.drawLine(i, zeroY-5, i, zeroY+5);
41                 for(int i=winY+ponyIE;i<=winY;i+=ponyIE)
42                     g.drawLine(zeroX-5, i, zeroX+5, i);
43                 for(int i=winY-ponyIE;i>0;i-=ponyIE)
44                     g.drawLine(zeroX-5, i, zeroX+5, i);
45
46                 for(int i=1;zeroX+i*ponyIE<winX;++i)
47                     g.drawString(""+i, zeroX+i*ponyIE-4, zeroY+20);
48                 for(int i=-1;zeroX+i*ponyIE>0;--i)
49                     g.drawString(""+i, zeroX+i*ponyIE-4, zeroY+20);
50                 for(int i=1;zeroY+i*ponyIE<winY;++i)
51                     g.drawString(""+(-i), zeroX-25, zeroY+i*ponyIE+4);
52                 for(int i=-1;zeroY+i*ponyIE>0;--i)
53                     g.drawString(""+(-i), zeroX-25, zeroY+i*ponyIE+4);
54
55                 g.setColor(Color.BLACK);
56                 /*CORE*/
57                 int tmpa,tmpb;
58                 for(int i=-10000;i<=10000;++i)
59                 {
60                     tmpa=(int)(ponyX(i/(double)ponyPrecision)*ponyIE)+zeroX;
61                     tmpb=(int)(-ponyY(i/(double)ponyPrecision)*ponyIE)+zeroY;
62                     g.drawLine(tmpa, tmpb, tmpa, tmpb);
63                 }
64             }
65         };
66
67         /*Whole*/
68         ponyFrame.setSize(winX,winY);
69         ponyFrame.setResizable(false);
70         ponyFrame.setLocationRelativeTo(null);
71         ponyFrame.addWindowListener(new PonyWinAdapter());
72
73         /*ICON*/
74         File directory = new File("");
75         ponyFrame.setIconImage(Toolkit.getDefaultToolkit().getImage(directory.getCanonicalPath()+"\\icons\\32.png"));
76
77         /*DRAW*/
78         ponyJPanel.setBounds(2, 2, winX-10, winY-10);
79         ponyFrame.add(ponyJPanel);
80
81
82         ponyFrame.setVisible(true);
83         return;
84     }
85 }
86
87 class PonyWinAdapter extends WindowAdapter
88 {
89     public void windowClosing(WindowEvent windowEvent){
90         System.exit(0);
91         return;
92     }
93 }

附件：

*jar所在目录*\\icons\\

32.png