> ((Cat)cats.elementAt(j)).print();
as cats is a Vector and elementAt(int index) return an Object the Object
needs to be cast to a Cat so the method print() can be used, same as
Cat c = (Cat)elementAt(j);
c.print();
cheers pb...
Sampat Palani wrote:
>
> this is a simple java query
> someone asked me this
> now i dont have an explanation the example is frm bruce eckel's thinking in
> java
> //****************************************
> import Tools.essential.*;
> class Cat{
> private int Catno;
> Cat(int i){
> Catno = i;
> }
> void print(){
> System.out.println("Cat " + Catno);
> }
> }
>
> class Dog{
> private int Dogno;
> Dog(int i){
> Dogno = i;
> }
> void print(){
> System.out.println("Dog " + Dogno);
> }
> }
>
> public class CatsAndDogs{
> public static void main(String args[]){
> Vector cats = new Vector();
> for(int i=0;i<7;i++){
> cats.addElement(new Cat(i));
> }
> cats.addElement(new Dog(7));
> for(int j=0;j<cats.size();j++){
> ((Cat)cats.elementAt(j)).print();
> }
> }
> }
> //**************************************************************************
> can anyone explanin the following line in the code
>
> ((Cat)cats.elementAt(j)).print();
>
> thanx
> regards
> Sam
>
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--
--------------------------------------------------------------------------------------
Peter Blakeley
JSP Servlets JINI RMI EJB Javaspaces
[ coolcat.com.au ]
If one innocent person is executed should not all those who voted
for and or support state sanctioned killing also be executed ?
.
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Some relevant FAQs on JSP/Servlets can be found at:
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