An example of declaring an enum inside a class : enum « Object Oriented « SCJP

1. SCJP
2. Object Oriented
3. enum

class MyClass2 {
  enum Problem {BIG, HUGE, SMALL }
  
  Problem size;
}

public class MainClass {
  public static void main(String[] args) {
    MyClass2 drink = new MyClass2();
    drink.size = MyClass2.Problem.BIG;   // enclosing class name required
  }
}