Use method in constructor?

Question

Is it possible to call a method in a constructor if that method belongs to the same class? Will there be problems calling the method since the object hasn't been completely created yet?
Example code:
Class Foo
  // constructor
public Foo()
   method bar();
public void bar()
}In my class, I'd like to initialise some attributes in the constructor. After object creation, that initialisation (which includes some ordening) should also be available as a public method, to re-order my attributes if necessary. I'd like to avoid using double code for the ordering (both in the constructor and in the method).

Answer 1

Is it possible to call a method in a constructor if
that method belongs to the same class?
Yes, but it's often not recommended for the reason you have discovered:
Will there be problems calling the method since the object hasn't
been completely created yet?
This depends on what the method does and at which point you call it. The object has been fully created, it's just not properly initialized. If you call the method after you've set all instance variables to their initial values there should be no problem.
But you should make that method final, private, or static so that it won't be possible to override it from subclasses. If someone writes a subclass that overrides that method, the method will be called before the subclass instance has had any chance to initialize itself which is a likely source of bugs.