publicclassyuanzhuiextendsRectangleimplementsArea,Volume{privatedoubleradius;privatedoublelength;privatedoubleheight;publicyuanzhui(doubleradius,doublelength,doubleheight…
public class yuanzhui extends Rectangle implements Area,Volume
{
private double radius;
private double length;
private double height;
public yuanzhui(double radius,double length,double height)
{
this.radius = radius;
this.length = length;
this.height = height;
}
public yuanzhui()
{
this(0,0,0);
}
public double area() //计算圆锥的表面积，实现Area接口中的抽象方法
{
return Math.PI*this.radius*this.length+Math.PI*this.radius* this.radius ;
}
public double volume() //计算圆锥的体积，实现Volume接口中的抽象方法
{
return Math.PI * this.radius * this.radius * this.height/3;
}
public String toString()
{
return “一个圆锥，半径”+this.radius+”，高”+this.height+”,斜边,”+this.length+”表面积为”+this.area()+”，体积为”+this.volume();
}
public static void main(String args[])
{
System.out.println(new yuanzhui(10,5,3).toString());
}
}
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