Force Initialization of an enumerated type in Java

Question

I am attempting to find a way to force Java to load/initialize an enumerated type (which is nested within a class that contains a static Map).

This is important to me be

Answer 1

You can just reference something in the enum class. For example:

public class EnumTest {
  static final Map map = new HashMap();

  enum MyEnum {
    FOO, BAR, BAZ;

    MyEnum() {
      map.put(name(), this);
    }
  }
  static {
    // ensure MyEnum is initialized
    MyEnum.values();
  }

  public static void main(String[] argsa) {
    System.out.println(map.size());
  }
}