In the previous chapter, Self-Test Question 16 described a class Person to repre

Question

In the previous chapter, Self-Test Question 16 described a class Person to represent a person. The class has instance variables for a person's name, which is a a string, and an integer age. These variables are name and age, respectively
a string, and an integer age. These variables are name and age, respectively.
a. Write a default constructor for Person that sets name to the string
"No name yet" and age to zero.
b. Write a second constructor for Person that sets name to a given string
and age to a given age.
c. Write a static method createAdult for Person that returns a special instance
of this class. The instance represents a generic adult and has the
name "An adult" and the age 21.

Explanation / Answer

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public class Person
{
    private String personName;
    private int age;
    Person()
    {
        personName="No name yet";
        age=0;
    }
    Person(String s,int a)
    {
        personName=s;
        age=a;
    }
    public Person createAdult()
    {
        this.personName="An Adult";
        this.age=21;
        return this;
    }
}

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