Advanced quizzes – Java final classes and variables

The following Java exercise(s) are designed for advanced level developers. If the level is too hard, then I recommend to select an easier one or you might consider reading my article about this topic, which offers a theoretical explanation including more exercises. Read More: Java Final Classes And Methods

final-classes-red

Quiz 1: Final classes and variables in Java

What appears in the standard output when this program is invoked?

public class Super {

	final int x = 2;
	int y = 3;

	Super() {
		y ++ ;
		System.out.print("-x" + method());
	}
	int method(){
		return x + y;
	}
	int method(int i){
		return y + x + i;
	}
}

class Final extends Super {

	final int x = 5;
	int y = 6;

	Final() {
		y ++ ;
		System.out.print("-x" + method(3));
	}
	final int method(){
		System.out.print("-x" + y + "-x" + (x + 1));
		return y + 3;
	}
	final int method(int x){
		return y + super.x + x;
	}
	public static void main(String[] args){
		Final f = new Final();
	}
}

Select the correct answer.


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SarMaroof.com offers a practical method to learn and improve your Java skills. It avoids unnecessary long boring theoretical explanations, but it uses many exercises and quizzes.



Sar Maroof is graduated from HBO Amsterdam "higher professional education". He is a professional computer programming teacher, gives master classes and publishes technical articles. His experience with developing software started from 2001 and he has worked as a software developer for several big as well as small companies and later as a freelancer. He is the author of Java quizmaster and Build a Java application in 7 days.

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