按要求编写一个Java应用程序：

class rectangle
{
private int x;
private int y;

rectangle(int x,int y)
{
this.x=x;
this.y=y;
}
public int acreage()
{
retrun x*y;
}
}

class cuboid extends rectangle
{
private int z;
cuboid(int x,int y,int z)
{
super(x,y);
this.z=z;
}

public int cubage()
{
return x*y*z;
}
}

publicclass Test {
publicstaticvoid main(String[] args){

cuboid c =new cuboid(2,3,4);
int i = c.cubage();

System.out.println("体积："+ i);
}


}