Specifying initial values in a class definition : Defining Class « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. Defining Class

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

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

class B {
  static A a = new A(1);

  B() {
    System.out.println("Table()");
    staticA.f(1);
  }

  void f2(int marker) {
    System.out.println("f2(" + marker + ")");
  }

  static A staticA = new A(2);
}

class C {
  A a = new A(3);

  static A staticA = new A(4);

  C() {
    System.out.println("Cupboard()");
    staticA.f(2);
  }

  void f3(int marker) {
    System.out.println("f3(" + marker + ")");
  }

  static A staticA2 = new A(5);
}

public class MainClass {
  public static void main(String[] args) {
    System.out.println("Creating new Cupboard() in main");
    new C();
    System.out.println("Creating new Cupboard() in main");
    new C();
    t2.f2(1);
    t3.f3(1);
  }

  static B t2 = new B();

  static C t3 = new C();
}

Bowl(1)
Bowl(2)
Table()
f(1)
Bowl(4)
Bowl(5)
Bowl(3)
Cupboard()
f(2)
Creating new Cupboard() in main
Bowl(3)
Cupboard()
f(2)
Creating new Cupboard() in main
Bowl(3)
Cupboard()
f(2)
f2(1)
f3(1)