Explicit static initialization with the static clause

[Java Tip]

Code:

class Cup {
  Cup(int marker) {
    System.out.println("Cup(" + marker + ")");
  }

  void f(int marker) {
    System.out.println("f(" + marker + ")");
  }
}

class Cups {
  static Cup c1;

  static Cup c2;
  static {
    c1 = new Cup(1);
    c2 = new Cup(2);
  }

  Cups() {
    System.out.println("Cups()");
  }
}

public class ExplicitStatic {
  public static void main(String[] args) {
    System.out.println("Inside main()");
    Cups.c1.f(99); // (1)
  }
  // static Cups x = new Cups(); // (2)
  // static Cups y = new Cups(); // (2)
}