Section 9.9 Check Point Questions3 questions

9.9.1

What is an accessor method? What is a mutator method? What are the naming conventions for accessor methods and mutator methods?

9.9.2

What are the benefits of data field encapsulation?

9.9.3

In the following code, radius is private in the Circle class, and myCircle is an object of the Circle class. Does the highlighted code cause any problems? If so, explain why.

public class Circle {
  private double radius = 1;

  /** Find the area of this circle */
  public double getArea() {
    return radius * radius * Math.PI;
  }

  public static void main(String[] args) {
    Circle myCircle = new Circle();
    System.out.println("Radius is " + myCircle.radius);
  }
}