JOptionPane

Hi.
I am having a problem with my program. I am trying to create a logon
usint the JOptionPane, however, it will not correctly compare my
inputs.
Any ideas.
Cheers.

//here follows some code which serves no useful purpose
import javax.swing.JOptionPane;

public class hacking {
    public static void main( String args[] ){
        String username, coreuser="admin";
        String passcode;
        String domain, coredom="Google";
        int passcodeint, corepass=10179264;
        Boolean user=false,pass=false,dom=false;

        username = JOptionPane.showInputDialog( "Enter UserName" );
        passcode = JOptionPane.showInputDialog( "Enter PassCode" );
        domain = JOptionPane.showInputDialog( "Enter Domain" );
        passcodeint = Integer.parseInt( passcode );

        if( username == coreuser ) user = true;
        if( passcodeint == corepass ) pass = true;
        if( domain == coredom ) dom = true;

        //here follows a debug line
        JOptionPane.showMessageDialog( null, user+" "+pass+" "+dom,
"Booleans", JOptionPane.PLAIN_MESSAGE );

        if( user == true & pass == true & dom == true ){
            JOptionPane.showMessageDialog( null,"Access Granted"
,"Login Successful" ,JOptionPane.PLAIN_MESSAGE );
        } else {
            JOptionPane.showMessageDialog( null,"Access Denied" ,"Login
Unsuccessful" ,JOptionPane.PLAIN_MESSAGE );
        }
    }
}