Here is what I have to do;

I need to know how to write two classes one a user defined class called Person with private instance variables defined as;

private int age;
private String firstName;
private string lastName;

the class needs a constructor;

public Person(String_firstName, String_lastName, int_age)

that assigns values to the private instance variables. The class should also include public methods;

public void printName() - prints the persons name
public void printAge()
public void printAgeGroup()

The second class with the method, "public static void main(String args[])". At least two objects based on the person class should be created in the "main" method. The name, age, and age group should be displayed for each object.



Here is what I have so far but it is not working can anyone help me with this?

public class Person
{
private int age;
private String firstName;
private String lastName;
private String nameString;
private String ageString;

public Person(String firstName, String lastName, int age)
{
this.age = age;
this.firstName = firstName;
this.lastName = lastName;
}

public void printName()
{
System.out.println(nameString);
}

public void printAge()
{
System.out.println(ageString);
}

public void printAgeGroup()
{
System.out.println(nameString);
System.out.println(ageString);
}


}

and this but it prints null to the screen instead of the names and ages

public class TestPerson
{
public static void main(String[] args)
{
Person person1 = new Person("John", "Smith", 32);
Person person2 = new Person("Jane", "Doe", 25);
person1.printName();
person1.printAge();
person1.printAgeGroup();

person2.printName();
person2.printAge();
person2.printAgeGroup();

}
}

Please post your code like this:

you never assign a value to nameString

2 alternatives:

you assign it in the constructor



or your forget your nameString variable and build it on request



As far as ageString is concerned you never assign a value to it

Thank You very much for your help

No problem.. happy coding