java网课学习的练习题：在TestCylinder类中创建Cylinder类的对象，设置圆柱的底面半径和高，并输出圆柱的体积

圆柱的底面半径和高，并输出圆柱的体积"/>

java网课学习的练习题：在TestCylinder类中创建Cylinder类的对象，设置圆柱的底面半径和高，并输出圆柱的体积

java网课学习的练习题：在TestCylinder类中创建Cylinder类的对象，设置圆柱的底面半径和高，并输出圆柱的体积

网课地址：=57

练习要求如上
Circle类

public class Circle {double radius;Circle() {radius = 1;}public double getRadius() {return radius;}public void setRadius(double radius) {this.radius = radius;}public double getArea() {return 3.14*radius*radius;} 
}

Cylinder类

public class Cylinder extends Circle {double length;public Cylinder() {this.length=1;}//获取圆柱的高public double getLength() {return length;}
//设置圆柱的高public void setLength(double length) {this.length = length;}//返回和计算圆柱的体积public double getVolume() {return this.getArea()*this.length;}
}

TestCylinder

public class TestCylinder {public static void main(String[] args) {Cylinder cylinder = new Cylinder();//设置圆的半径和圆柱的高都为2cylinder.setRadius(2);cylinder.setLength(2);cylinder.getRadius();cylinder.getLength();System.out.println("圆的面积："+cylinder.getArea());System.out.println("圆柱的体积："+cylinder.getVolume());}
}

运行结果

请大家多多指教！谢谢！