Question

I am a beginner in java and am writing a stack class using array.

So I have a method in this class called pop

 public int Pop(){
   if (current_size >0)
    { // do something 
      return ele;
     }
     // return nothing  <-- ths is where error is
     }

Since i have the return type int.. the class is always expecting to return something.
How should I tackle such cases where the method wil return something if the condition is true else it wont shouldnt return anything?
Thanks

Answer 1

You must always return something (unless your method is void) or throw an exception. You could try this:

public int pop() {
    if (current_size > 0) 
        return ele;
    throw new EmptyStackException();
}