unsafe operation

[Covinus]

import java.util.*;

public class al{

    public static void main(String[] args){
        List l = new ArrayList();

        Object a = "hello";
        l.add(a);
        l.add("asdasd");
        l.add("hgdfsdfshjk");
        System.out.println(l.isEmpty()+"");
        System.out.println(l.get(0));
        for(int i=0;i<l.size();i++){
            String b = (String)l.get(i);
            System.out.println(b);
        }




    }
}

i still havent figured out how to solve the warning it gives. can someone esplain to me the warning and maybe you could teach me how to properly use collections.

thanks

[masijade]

If you have JDK 1.5 it is because you are not using Generics.

Read about Generics in the New Features portion of the Java SE 5 documentation on Sun.

http://java.sun.com/j2se/1.5.0/docs/index.html