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 Inheritance.
Article: Java inheritance Quizzes: Beginner Intermediate Advanced |
Quiz 1: Inheritance, accessing methods and constructors of a super class.
What happens when the following program is compiled and run?
public class SuperB { protected int a = 2; protected int b = 3; public SuperB() { a += 1; b += 2; System.out.print("-b" + b); } public SuperB(int i) { this(); b -= 1; System.out.print("-b" + a); a -= 1; } public int getB(){ this.a += 2; this.b += 4; return b - a; } } public class SuperA extends SuperB { int a; int b = 1; public SuperA() { super(3); a += 7; b += 5; } } public class MySub extends SuperA { public MySub() { System.out.print("-b" + a); System.out.print("-b" + b); System.out.print("-b" + getB()); } public static void main(String[] args){ MySub mySub = new MySub(); } }
Article: Java inheritance Quizzes: Beginner Intermediate Advanced |
Suggested Articles
![]() ![]() ![]() |
That’s 2 clever by half and 2×2 clever 4 me. Thnska!