rectangle.java

这是一种用JAVA开发的图形画法程序 没有错误 欢迎各位朋友改进并上传

/**
 * Title: Rectangle.java
 * Description: should be subclasses of GeometricShape and include the implementation of two methods
 * named calculateArea and calculatePerimeter.
 * 
 * Copyright: Copyright (c) 2006
 * @author Q Jin
 * @version 1.0 
 */

public class Rectangle extends GeometricShape{
	// this is a default Rectanfle method
	public Rectangle(){
		this(0,0);
	}
	
	// this is a Rectangle method with two parameters 
	public Rectangle( int x, int y ){
		this.x = x;
		this.y = y;
	}
	
	/**
	 * this is a calculateArea method
	 * 
	 * @return x*y        this is a area of shapes
	 */
	public int calculateArea(){
		return x * y;
	}
	
	/**
	 * this is a calculatePerimeter method
	 * 
	 * @return 2 * ( x + y )  this is perimeter of shapes
	 */ 
	public int calculatePerimeter(){
		return 2 * ( x + y );
	}
	
}