Scanner entrance = new Scanner(System.in);
 String nulled = entrance.nextLine();
  if (nulled=="running"){
    System.out.println("Nulled works well");
  }
  else if (nulled=="attack"){
    System.out.println("Nulled actually is under attack");
  }
  else if (nulled=="offline") {
    System.out.println("nulled doesnt work");
  }
  else {
    System.out.println("Please write "running", "attack" or "offline" if you want get answer");
  }
entrance.close();