Question

This is a question about Java abstract classes. The correct answer is E and I do not understand why.

Please be specific! I am a beginner in Java abstract classes and methods...

13.6 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 {
  /** No-arg 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");
  }
}

A. ABCD

B. BACD

C. CBAE

D. AEDC

E. BEDC