public class BoxRunner {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// create boxes using the various 
        // constructors 
        Box mybox1 = new Box(10, 20, 15); 
        Box mybox2 = new Box(); 
        Box mycube = new Box(7); 
  
        int vol; 
  
        // get volume of first box 
        vol = mybox1.volume(); 
  
        System.out.println(" Volume of mybox1 is " + vol); 
  
        // get volume of second box 
        vol = mybox2.volume(); 
        System.out.println(" Volume of mybox2 is " + vol); 
  
        // get volume of cube 
        vol = mycube.volume(); 
        System.out.println(" Volume of mycube is " + vol); 

	}

}