static section Initializer and logic : static Member « Class Definition « Java Tutorial

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

public class ClassInitializer6 {
  static int classField = 3;

  static {
    System.out.println(" : " + classField);

    classField = 1;
    for (int i = 2; i < 6; i++)
      classField *= i;
  }

  static {
    System.out.println(" = " + classField);
  }

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