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：

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

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

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

    static double ponyX(double i){
        return i;
    }
    static double ponyY(double i){
        return i*4+5;
    }

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

　　还能画出来各种奇奇怪怪的图形，比如说胡子

代码如下：

import java.awt.*;
import java.awt.event.*;
import java.awt.Graphics;
import java.io.*; 
import java.util.*;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class PonysAlgorithm extends JFrame
{
    static int winX=800,winY=600;
    static int ponyIE=30;
    static int zeroX=winX/2,zeroY=winY/2;
    static int ponyPrecision=100;
    
    static double ponyX(double i){
        return 4*Math.sin(i)+2;
    }
    static double ponyY(double i){
        return 4*Math.cos(i)+3;
    }
    
    public static void main(String[] args) throws Exception
    {
        JFrame ponyFrame=new JFrame("Pony's Algorithm");
        ponyFrame.setLayout(null);
        JPanel ponyJPanel=new JPanel(){
            public void paint(Graphics g){
                super.paint(g);
                
                g.setColor(Color.GRAY);
                /*Coordinate Axis*/
                g.drawLine(zeroX, 0, zeroX, winY);
                g.drawLine(0, zeroY, winX, zeroY);
                
                for(int i=zeroX+ponyIE;i<=winX;i+=ponyIE)
                    g.drawLine(i, zeroY-5, i, zeroY+5);
                for(int i=zeroX-ponyIE;i>0;i-=ponyIE)
                    g.drawLine(i, zeroY-5, i, zeroY+5);
                for(int i=winY+ponyIE;i<=winY;i+=ponyIE)
                    g.drawLine(zeroX-5, i, zeroX+5, i);
                for(int i=winY-ponyIE;i>0;i-=ponyIE)
                    g.drawLine(zeroX-5, i, zeroX+5, i);
                
                for(int i=1;zeroX+i*ponyIE<winX;++i)
                    g.drawString(""+i, zeroX+i*ponyIE-4, zeroY+20);
                for(int i=-1;zeroX+i*ponyIE>0;--i)
                    g.drawString(""+i, zeroX+i*ponyIE-4, zeroY+20);
                for(int i=1;zeroY+i*ponyIE<winY;++i)
                    g.drawString(""+(-i), zeroX-25, zeroY+i*ponyIE+4);
                for(int i=-1;zeroY+i*ponyIE>0;--i)
                    g.drawString(""+(-i), zeroX-25, zeroY+i*ponyIE+4);
                
                g.setColor(Color.BLACK);
                /*CORE*/
                int tmpa,tmpb;
                for(int i=-10000;i<=10000;++i)
                {
                    tmpa=(int)(ponyX(i/(double)ponyPrecision)*ponyIE)+zeroX;
                    tmpb=(int)(-ponyY(i/(double)ponyPrecision)*ponyIE)+zeroY;
                    g.drawLine(tmpa, tmpb, tmpa, tmpb);
                }
            }
        };
        
        /*Whole*/
        ponyFrame.setSize(winX,winY);
        ponyFrame.setResizable(false);
        ponyFrame.setLocationRelativeTo(null);
        ponyFrame.addWindowListener(new PonyWinAdapter());
        
        /*ICON*/
        File directory = new File("");
        ponyFrame.setIconImage(Toolkit.getDefaultToolkit().getImage(directory.getCanonicalPath()+"\icons\32.png"));
        
        /*DRAW*/
        ponyJPanel.setBounds(2, 2, winX-10, winY-10);
        ponyFrame.add(ponyJPanel);
        
        
        ponyFrame.setVisible(true);
        return;
    }
}

class PonyWinAdapter extends WindowAdapter
{
    public void windowClosing(WindowEvent windowEvent){   
        System.exit(0);
        return;
    }
}

附件：

*jar所在目录*\icons\

32.png