ใช้ while loop วนไม่ได้นะครับ มันขึ้น Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - incomparable types:

Scanner in = new Scanner(System.in);
        int number = in.nextInt();
        while(number != null){
        if(number == 1){
       System.out.print("you have locked in to the data base");
        }else{
            System.out.print("you enter the wrong key");
        
        }
            
    }