Question

问一个java编程问题：定义一个矩形类(Rectangle) 已知对角线的坐标求面积和周长

对角线的坐标是未知数呢？

Answer 1

public class Rectangle{
private int left,top,right,bottom;
public Rectangle(int left,int top,int right,int bottom){
this.left=left;
this.top=top;
this.right=right;
this.bottom=bottom;
}
public int getWidth(){
return Math.abs(right-left);
}
public int getHeight(){
return Math.abs(top-bottom);
}
public int getPerimeter(){
return (getWidth()+getHeight())*2;
}
public int getArea(){
return getWidth()*getHeight();
}
public static void main(String []args){
Rectangle rect=new Rectangle(0,0,50,60);
System.out.println("Perimeter:"+rect.getPerimeter());
System.out.println("Area:"+rect.getArea());
}
}

Answer 2

不给参考坐标系，无解