An Java inner class that extends its outer class (cause...why not?)

InsideOut.java

public class InsideOut {

	public static void main(String[] args){
		System.out.println(new OutsideIn().toString());
	}
	
	public InsideOut() {}
	
	@Override
	public String toString(){
		return "Outside";
	}
	
	public static class OutsideIn extends InsideOut {
		
		public OutsideIn() {}
		
		@Override
		public String toString(){
			return "Inside";
		}
		
	}

}