Java语言程序设计第十章编程练习题10.13

public class MyRectangle2D {

	public double x=0;
	public double y=0;
	public double width=1;
	public double height=1;
	public double getX() {
		return x;
	}
	
	public void setX(double x) {
		this.x=x;
	}
	
	public double getY() {
		return y;
	}
	
	public void setY(double y) {
		this.y=y;
	}
	
	public double getWidth() {
		return width;
	}
	
	public void setWidth(double width) {
		this.width=width;
	}
	
	public double getHeight() {
		return height;
	}
	
	public void setHeight(double height) {
		this.height=height;
	}
	
	public MyRectangle2D(double x,double y,double width,double height) {
		this.x=x;
		this.y=y;
		this.width=width;
		this.height=height;
	}
	
	public double getArea() {
		return width*height;
	}
	
	public double getPerimeter() {
		return 2*(width+height);
	}
	
	public boolean contains(double x,double y) {
		boolean result =false;
		if((Math.abs(x-this.x)<=width/2)&&(Math.abs(y-this.y)<=height/2))
				result=true;
		return result;	
	}
	
	public boolean contains(MyRectangle2D r) {
		return  contains(r.x-r.width/2,r.y-r.height/2)&&
				contains(r.x-r.width/2,r.y+r.height/2)&&
				contains(r.x+r.width/2,r.y-r.height/2)&&
				contains(r.x+r.width/2,r.y+r.height/2);
	}
	
	public boolean overlaps(MyRectangle2D r) {
		if(contains(r)==true)
			return false;
		else
			return  contains(r.x-r.width/2,r.y-r.height/2)||
					contains(r.x-r.width/2,r.y+r.height/2)||
					contains(r.x+r.width/2,r.y-r.height/2)||
					contains(r.x+r.width/2,r.y+r.height/2);
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		MyRectangle2D r1 =new MyRectangle2D(2,2,5.5,4.9);
		System.out.println("面积为"+r1.getArea()+"周长为"+r1.getPerimeter());
		System.out.println("点(3,3)是否在矩形内"+r1.contains(3,3));
		System.out.println("矩形(4,5,10,5,3.2)是否在该矩形内"+r1.contains(new MyRectangle2D(3,5,2.3,5.4)));
		System.out.println("是否与矩形(3,5,2.3,5.4)重叠"+r1.overlaps(new MyRectangle2D(3,5,2.3,5.4)));
	}

}