Beispiel

public static void main( String[] args ){
Integer first = new Integer( 1 );
Integer second = new Integer( 1 );

System.out.println( first == second );
}

Lösung
Verwenden Sie die Methode 'java.lang.Object.equals()'.

public static void main( String[] args ){
Integer first = new Integer( 1 );
Integer second = new Integer( 1 );

System.out.println( first.equals( second ) );
}