Creating an object of SelectedTag

The code to do create an instance of class SelectedTag is as follow:

Code :

---

Tag[] array;
 
  array = new Tag[4];
 
  array[1] = new Tag();
  SelectedTag d = new SelectedTag(2,array);

---

The error is in line 4 which results in java.lang.NullPointerException.

Perhaps the exception is occurring within the SelectedTag constructor.

That's only a guess. Consider posting some code that compiles but throws that exception when it is run. Make the code as simple and short as possible to illustrate the problem.