reference static field after declaration : static Member « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. static Member

public class ClassInitializer3 {
  static int classField1 = 1;
  static int classField2 = 1 + classField1;

  public static void main(String[] args) {
    System.out.println(classField1);
    System.out.println(classField2);
  }
}