Private Member Access Java

Is the private member access at the class level or at the object level. If it is at the object level, then the following code should not compile

    class PrivateMember {   private int i;   public PrivateMember() {      i = 2;   }   public void printI() {      System.out.println("i is: "+i);   }   public void messWithI(PrivateMember t) {      t.i *= 2;   }   public static void main (String args[]) {      PrivateMember sub = new PrivateMember();      PrivateMember obj = new PrivateMember();      obj.printI();      sub.messWithI(obj);      obj.printI();   }}

Please clarify if accessing the member i of obj within the messWithI() method of sub is valid