package exp3;

import java.lang.Math;

class Line extends Point{
	protected int x,y;  

	Line(int a,int b){   
		super(a,b);  
		setLine(a,b);  
	}  

	public void setLine(int x,int y)  {  
		this.x=x+x;   
		this.y=y+y;  
	}   

	public double length(){  
		int x1=super.x,y1=super.y,x2=this.x,y2=this.y;  
		return Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));  
	}  
	public String toString(){  
		return "直线端点：["+super.x+","+super.y+"]["+x+","+y+"]直线长度："+this.length();  
	}
	public int getX() {
		return x;
	}
	public int getY() {
		return y;
	}
	public void setX(int x) {
		this.x = x;
	}
	public void setY(int y) {
		this.y = y;
	} 
}