testmyshape.java

Java实现简单画图程序随机生成三种图形颜色等

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


public class TestMyShape extends JFrame
{
	MyShape myshape[];
    int choice,count;
		
    private Random randomNumbers=new Random();
    	
	public TestMyShape()
	{
	 
	 super(" TestMyShape");

	 count=10+randomNumbers.nextInt(10);
	 myshape=new MyShape[count];
	 
	 /*switch(choice)
	 {
	  	case 1:myshape=new MyLine[count];break;
	  	case 2:myshape=new MyOval[count];break;
	  	case 3:myshape=new MyRect[count];break;
	 }*/


	 setSize(1024,728);
     setVisible(true);
	}
	
	public void paint(Graphics g)
	{
		 super.paint( g );
		 
		 choice=1+randomNumbers.nextInt(3);

		for(int i=0;i<count;i++)
		{
			 int x11=randomNumbers.nextInt(500);
	  	     int y11=randomNumbers.nextInt(500);
	  	     int x21=randomNumbers.nextInt(500);
	  	     int y21=randomNumbers.nextInt(500);
			
			switch(choice)
			{
				case 1:myshape[i]=new MyLine(x11,y11,x21,y21);break;
				case 2:myshape[i]=new MyOval(x11,y11,x21,y21);break;
				case 3:myshape[i]=new MyRect(x11,y11,x21,y21);break;
			}
			
			myshape[i].draw(g);
		}
	}
	
    public static void main(String args[])
   {
   	 
    TestMyShape testMyShape=new TestMyShape();
    testMyShape.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

   }
   
 }