Question

Consider the definition of the Person class below. The class uses the instance variable adult to indicate whether a person is an adult or not.

public class Person
{
private String name;
private int age;
private boolean adult;
public Person (String n, int a)
{

name = n;
age = a;
if (age >= 18)
{
adult = true;
}
else
{
adult = false;
}
}
}

Which of the following statements will create a Person object that represents an adult person?

a. Person p = new Person ("Homer", "adult");
b. Person p = new Person ("Homer", 23);
c. Person p = new Person ("Homer", "23");
d. Person p = new Person ("Homer", true);
e. Person p = new Person ("Homer", 17);

Answer 1

Answer:

b. Person p = new Person ("Homer", 23);

Explanation:

The statement that will create an object that represents an adult person would be the following

Person p = new Person ("Homer", 23);

This statement creates a Person object by called the Person class and saving it into a variable called p. The Person method is called in this object and passed a string that represents the adult's name and the age of the adult. Since the age is greater than 18, the method will return that adult = true.

The other options are either not passing the correct second argument (needs to be an int) or is passing an int that is lower than 18 meaning that the method will state that the individual is not an adult.