Java conditional statement

Possible Duplicate:
Java String.equals versus ==

I am using jcreator to practice java language. I came up with a conditional statement in which if the user input is = "test" it will print an "okay!" message. This is my code:

class conditional {


    public static void main (String[] args) {

        Scanner user_input = new Scanner(System.in);

        String username;
        System.out.print("username: ");
        username = user_input.next();
            if (username == "test") {
                System.out.println("okay");
                    }

                    else {
                                    System.out.println("not okay");
    }
}

The above code does not show any error, it does not display the "okay" && "not okay" message either. I am not sure what's wrong with my logic.

Answer

as @veer said,
you can use equalsIgnoreCase / equals

if (username.equals("test")) { ... }

Or

You can use compareToIgnoreCase / compareTo

if (username.compareTo("test")==0) { ... }