HelloWorld.java

public class HelloWorld {
	static class A {
		public A() {
			System.out.println("A");
		}
	}
	
	static class B extends A {}
	
	public static void main (String[] args) {
		B b = new B(); // output: A
	}
}


public class HelloWorld {
	static class A {
		public A() {
			System.out.println("A");
		}
	}
	
	static class B extends A {
	    public B() {
	        System.out.println("B");
	    }
	}
	
	public static void main (String[] args) {
		B b = new B(); // output: A\nB
	}
}