error unchecked call to addElement in vector

[Arun Maalik]

import java.util.*;
public class first{
  public static void main(String\u005B\u005D args){
    
     Vector v=new Vector();
     v.addElement("Maalik");
 
    }
 }

Dear sir when i am compiling above code then jvm showing an error message that java
warning [unchecked] unchecked call to addElement[E] as a memeber of raw type java.util
why sir what wrong with above code?

with regard

Arun kumar maalik

[Aniket Patil]

As of Java 5.0, the class Vector has been parameterized, meaning that you need to indicate what type of element your Vector object will hold.

If you compile the above code using javac -source 1.4, no unchecked warning will be thrown. This is because generics do not exist in Java 1.4.

As you want to add a String to a Vector, in Java 5.0, this should be written as:

    
Vector<String> v = new Vector<String>();
v.add("Maalik");

Perhaps you should go through generics first.
[ August 16, 2006: Message edited by: Aniket Patil ]