myoval.java

本程序是程序设计第五版课后习题,实现画圆,画直线,画矩形

import java.awt.*;
public class Myoval extends Myshape
{
	private int xo,yo;
	
	public Myoval()
	{
		setMyoval(0,0);
	}
	
	public Myoval(int x1,int y1,int p ,int x2,int y2)
	{
		super(x1,y1,p);
		setMyoval(x2,y2);
	}
	
	public void setMyoval(int x1,int y1)
	{
		xo = x1;
		yo = y1;
	}
	
	public int getxo()
	{
		return xo;
	}
	
	public int getyo()
	{
		return yo;
	}
	
	public void draw(Graphics g)
	{
		g.setColor(Color.magenta);
		if(super.getflag() ==0)
		g.drawOval(Math.min(super.getx(),getxo()),Math.min(super.gety(),getyo()),Math.abs(getxo()-super.getx()),Math.abs(getyo()-super.gety()));
        if(super.getflag() == 1)
        g.fillOval(Math.min(super.getx(),getxo()),Math.min(super.gety(),getyo()),Math.abs(getxo()-super.getx()),Math.abs(getyo()-super.gety()));
	}
	
	public String toSting()
	{
		return "point2:"+getxo()+","+getyo()+"]";
	}
}