Author Question: What is the output of running class Test?public class Test { public static void main(String[] args) ... (Read 51 times)

Mr3Hunna · **on:** May 6, 2020

Question 1

Suppose A is an abstract class, B is a concrete subclass of A, and both A and B have a default constructor. Which of the following is correct?
◦ B b = new A();
◦ A a = new A();
◦ A a = new B();
◦ B b = new B();

Question 2

What is the output of running class Test?

public class Test {
public static void main(String[] args) {

new Circle9();

}
}

public abstract class GeometricObject {
protected GeometricObject() {

System.out.print("A");

}

protected GeometricObject(String color, boolean filled) {

System.out.print("B");

}
}

public class Circle9 extends GeometricObject {
/** Default constructor */
public Circle9() {

this(1.0);

System.out.print("C");

}

/** Construct circle with a specified radius */
public Circle9(double radius) {

this(radius, "white", false);

System.out.print("D");

}

/** Construct a circle with specified radius, filled, and color */
public Circle9(double radius, String color, boolean filled) {

super(color, filled);

System.out.print("E");

}
}

◦ ABCD
◦ BACD
◦ BEDC
◦ CBAE
◦ AEDC

gabrielle_lawrence · **Reply #1 on:** May 6, 2020

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