The lab this lesson introduces students to writing programs that consist of multiple classes. By the end of this lab, students should be able to

write a class to define a type that contains instance data and methods

create multiple objects of that type

use objects of the same type independently

LinearPerson

A LinearPerson lives on a number line. At any time, he or she has a position, such as 0 or 3 or -5. He or she can move one position at a time. He or she has a direction of movement. So if a LinearPerson is moving right and is at position -3, the new position will be -2. If a LinearPerson is moving left and is at position -3, the new position will be -4.

The following describes the LinearPerson class:

You should decide the instance variables needed for LinearPerson.

Overloaded constructors: 

a no-argument constructor that sets the current position at 0 and the current direction as "to the right." 

a constructor that takes one int as a parameter; the parameter represents the initial position of the LinearPerson 

methods: 

public void turn() // changes the direction of the LinearPerson (right to left, or left to right) 

public void move() // moves the LinearPerson one position in his or her current direction 

public int getPosition() // returns the current position of the LinearPerson 

As an example

LinearPerson sophie = new LinearPerson(); // sophie is at position 0, moving right 

sophie.turn(); // sophie is at position 0, moving left 

sophie.move(); // sophie is at position -1, moving left 

sophie.move(); // sophie is at position -2, moving left 

sophie.turn(); // sophie is at position -2, moving right 

sophie.move(); // sophie is at position -1, moving right 

Create a class LinearPersonPair that creates two LinearPerson objects, one using the no-argument constructor, the other object should be created at a given location. The program moves the objects in various directions and prints their final locations.