boxdemo.java

it is a good tool to help you study java

class Boxdemo{
public static void main(String args[]){
Box mybox=new Box();
double vol;
mybox.width=10;
mybox.height=20;
mybox.depth=30;
vol=mybox.width*mybox.height*mybox.depth;
System.out.println("vol is "+vol);
}
}