rectangular.java

大学java作业源程序

package problem_8;
//Rectangular.java
//矩形类，继承图形类
public class Rectangular extends Graphics{
	private double length;		//长
	private double width;		//宽
	
	public Rectangular(String color, double weight, double length, double width){
		super(color, weight);
		this.length = length;
		this.width = width;
	}
	
	//返回长
	public double getLength(){
		return length;
	}
	
	//返回宽
	public double getWidth(){
		return width;
	}
	
	//设置长和宽
	public void setLengthAndWidth(double length, double width){
		this.length = length;
		this.width = width;
	}
	
	//抽象计算周长函数的实现
	public double calculatePerimeter(){
		return 2 * (length + width);
	}
	
	//抽象计算面积函数的实现
	public double calculateArea(){
		return length * width;
	}
}