Java constructor calling rules

JavaConstructor.java

class JavaConstrcutor {

	public static class A {
		public A() {
			System.out.println("A");
		}

		public A(String message) {
			System.out.println("A:"+message);
		}
	}

	public static class B extends A {
		public B() {
			System.out.println("B");
		}

		public B(String message) {
			System.out.println("B:"+message);
		}

		public B(String message, boolean dummy) {
			super(message);
			System.out.println("B:"+message);
		}
	}

	public static void main(String[] args) throws IOException {
		// A
		new A();
		System.out.println("-----------");

		// A:hello
		// (default constructor is not called by default)
		new A("hello");
		System.out.println("-----------");

		// A
		// B
		// (default constructor is called by default from superclass when no super() is used)
		new B();
		System.out.println("-----------");

		// A
		// B:hello
		// (default constructor is called by default from superclass when no super() is used, even for non-default subclass constrcutor)
		new B("hello");
		System.out.println("-----------");

		// A:hello
		// B:hello
		// (if super() is used, the default constructor from superclass is not called)
		new B("hello", true);
	}

}