java questions.

Question

2. Which keyword is always a reference to the object in which it occurs?

5. True or False?

  It is good practice to declare instance variables public, for easy access, and to declare getters and setters (a.k.a Accessors and Mutators) as private, so that only the class may use them.

13. True or False?

  The following is an example of a valid toString() method for a hypothetical Fish object that only has one instance variable called name of type String.

 

public void toString() {

 System.out.printf("A fish called %s%n", name);

}

Answer 1

The keyword "this" appearing in the body of a class C is a reference to an instance of class C.

It is good practice to declare instance variables private, so that only the class may use them, and

to declare getters and setters (a.k.a Accessors and Mutators) as public, for easy access.

There is a typo in the toString() method involving "%n". It should be

public void toString() {

System.out.printf("A fish called %s\n", name);

}