cylinder.java

来自「this sourse code for the hw problems in 」· Java 代码 · 共 20 行

class Cylinder extends Circle{
	private double length;
	Cylinder (double r, double l){
		super(r);
		this.length=l;
	}
	public double getlength(){
		return length;
	}
	public void setLength(double l){
		this.length=l;
	}
	public double findVolume(){
		return findArea()*length;
	}
	public double surfaceArea(){
		return ((2*findArea())+(2*Math.PI*rd*length));
	}
}