Conditional add of vectors... **RESOLVED**

[IwishIcouldprog]

Here s my problem.

I have 2 vectors. myVector and temp.

If myVector is empty or equal to null I just want to copy the value of temp into it.
If myVector is not empty then I want to append temp to it.

Here is my code:

 if (myVector == null){
                myVector = DocParser1.getVector();
                System.out.println("Vector equals null" + myVector);
            }
            else {
                myVector.addAll(temp);
                System.out.println("Vector does not equal null" + myVector);
            }

The code works fine when myVector is equal to null.

But if I add this line of code..

myVector.add(0,"HELLO");

Before the block if statement then nothing happens. Even the println statement does not execute.



I have tried the isEmpty function.

Any ideas?

[Dillinger4]

Your Vector cannot be null since you are adding an element to it with the line myVector.add(0,"HELLO"); so its obvious that you already have a refrence to it. With the following code the else statement is always executed.

 import java.util.*; 

 public class F{
   public static void main(String[] args){

   Vector v = new Vector(); 
   v.addElement("Poo"); 
   v.addElement("Poop"); 

   if (v == null){
      System.out.println("Vector equals null" + v);
    
    }else {
     System.out.println("Vector does not equal null" + v);
      }
   }
 }

[IwishIcouldprog]

Thanks. I found the answer here.

http://forums.anandtech.com/messagev...GE=1&zb=619775

Which was essentially the same as yours. I was missing the new Vector() assignment.

Thought I got alot more guff there.

[Dillinger4]

Anytime.