Problem: Create a base class called Vehicle that has the manufacturer's name (typeString), number of cylinders in the engine (type int), and the owner (type Person). Use thePerson class developed this semester. Create a class automobile that is derived from05and towing capacity in tons (type double). The classes should have:. Two constructors, a default and an overloaded constructorAll appropriate accessor and mutator methods (getters and setters)09A 'toString' methodA 'finalize' methodWrite a driver (client/test) class that tests ALL the methods. Be sure to invoke each of theconstructors, and ALL methods. Demonstrate polymorphism by creating an array ofvarious types of vehicles with varying property values050

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Asked May 6, 2019
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Problem: Create a base class called Vehicle that has the manufacturer’s name (type
String), number of cylinders in the engine (type int), and the owner (type Person). Use the
Person class developed this semester. Create a class automobile that is derived from
Vehicle and has additional properties: number of passengers (type int) and weight in tons
(type double). Create a class Truck which is derived from Vehicle and has additional
properties: the load capacity in tons (type double, since it may contain a fractional part)
and towing capacity in tons (type double). The classes should have:
• Two constructors, a default and an overloaded constructor
• All appropriate accessor and mutator methods (getters and setters).
• An ‘equals’ method (must conform to the Person example and the Object class ).
• A ‘toString’ method
• A ‘copy’ constructor
• A ‘clone’ method
• A ‘finalize’ method

Write a driver (client/test) class that tests ALL the methods. Be sure to invoke each of the constructors, and ALL methods. Demonstrate polymorphism by creating an array of various types of vehicles with varying property values.

-----------------------------------------------------------------------------------

person class:

// ------------------------------------------------
// Person.java
// ------------------------------------------------

public class Person {
// Class data items - instance variables
private StringBuffer firstName;
private StringBuffer lastName;
private int age;
private StringBuffer ssn;

// Class methods

public void setFirstName ( String x ) { firstName = new StringBuffer ( x ); }
public StringBuffer getFirstName () { return firstName; }
public void setLastName ( String x ) { lastName = new StringBuffer ( x ); }
public StringBuffer getLastName () { return lastName; }
public void setAge ( int a ) { age =a; }
public int getAge ( ) { return age; }
public void setSsn ( String x ) { ssn = new StringBuffer ( x ); }
public StringBuffer getSsn () { return ssn; }

public Person ( ) {
this ( " ", " ", 0, " " );
System.out.println ( "Person - default, no-arg constructor" );
}

public Person ( String fn, String ln, int a, String s ) {
firstName = new StringBuffer ( fn );
lastName = new StringBuffer ( ln );
age = a;
ssn = new StringBuffer ( s );
System.out.println ( "Person - overloaded, 4-arg constructor" );
}


public String toString ( ){
String x = " " + firstName + " " + lastName + " " + age + " " + ssn + " ";
return x;
}

public boolean equals ( Object obj ) {
if ( this == obj ) return true; // They're the same objects
if ( obj == null ) return false; // Argument is null
if ( getClass( ) != obj.getClass( ) ) return false;

Person d = ( Person ) obj;

if ( ( firstName.toString().equals ( d.firstName.toString() ) ) &&
( lastName. toString().equals ( d.lastName. toString() ) ) &&
( age == d.age ) )
{
return true;
}
else
{
return false;
}
}

public void finalize ( ) {
System.out.println ( "Person - finalize method" );
}
}

 

Problem: Create a base class called Vehicle that has the manufacturer's name (type
String), number of cylinders in the engine (type int), and the owner (type Person). Use the
Person class developed this semester. Create a class automobile that is derived from
0
5
and towing capacity in tons (type double). The classes should have:
. Two constructors, a default and an overloaded constructor
All appropriate accessor and mutator methods (getters and setters)
0
9
A 'toString' method
A 'finalize' method
Write a driver (client/test) class that tests ALL the methods. Be sure to invoke each of the
constructors, and ALL methods. Demonstrate polymorphism by creating an array of
various types of vehicles with varying property values
0
5
0
help_outline

Image Transcriptionclose

Problem: Create a base class called Vehicle that has the manufacturer's name (type String), number of cylinders in the engine (type int), and the owner (type Person). Use the Person class developed this semester. Create a class automobile that is derived from 0 5 and towing capacity in tons (type double). The classes should have: . Two constructors, a default and an overloaded constructor All appropriate accessor and mutator methods (getters and setters) 0 9 A 'toString' method A 'finalize' method Write a driver (client/test) class that tests ALL the methods. Be sure to invoke each of the constructors, and ALL methods. Demonstrate polymorphism by creating an array of various types of vehicles with varying property values 0 5 0

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Expert Answer

Step 1

Program plan:

  • Create a class called “Person” with required constructors and methods.
  • Create a class called “Vehicle” with required constructors and methods.
  • Create a class called “Automobile” that extends the class “Vehicle” with required constructors and methods.
  • Create a class called “Truck” that extends the class “Vehicle” with required constructors and methods.
  • Create a class called “Main” to test all methods.
Step 2

Program:

Given Person class as follows,

Person.java

public class Person {

  // Class data items - instance variables

  private StringBuffer firstName;

  private StringBuffer lastName;

  private int age;

  private StringBuffer ssn;

 

  // Class methods

 

  public void setFirstName(String x) {

    firstName = new StringBuffer(x);

  }

 

  public StringBuffer getFirstName() {

    return firstName;

  }

 

  public void setLastName(String x) {

    lastName = new StringBuffer(x);

  }

 

  public StringBuffer getLastName() {

    return lastName;

  }

 

  public void setAge(int a) {

    age = a;

  }

 

  public int getAge() {

    return age;

  }

 

  public void setSsn(String x) {

    ssn = new StringBuffer(x);

  }

 

  public StringBuffer getSsn() {

    return ssn;

  }

 

  public Person() {

    this(" ", " ", 0, " ");

    System.out.println("Person - default, no-arg constructor");

  }

 

  public Person(String fn, String ln, int a, String s) {

    firstName = new StringBuffer(fn);

    lastName = new StringBuffer(ln);

    age = a;

    ssn = new StringBuffer(s);

    //System.out.println("Person - overloaded, 4-arg constructor");

  }

 

  public String toString() {

    String x = " " + firstName + " " + lastName + " " + age + " " + ssn + " ";

    return x;

  }

 

  public boolean equals(Object obj) {

    if (this == obj)

      return true; // They're the same objects

    if (obj == null)

      return false; // Argument is null

    if (getClass() != obj.getClass())

      return false;

    Person d = (Person) obj;

    if ((firstName.toString().equals(d.firstName.toString())) && (lastName.toString().equals(d.lastName.toString()))

        && (age == d.age)) {

      return true;

    } else {

      return false;

    }

  }

 

  public void finalize() {

    System.out.println("\nPerson - finalize method");

  }

}

 

Step 3

Vehicle.java

 

// Definition of Vehicle class

public class Vehicle {

 

  // Declaration of variables

  private String name;

  private int cylinders;

  private Person owner;

 

  // Definition of parameterized constructor

  public Vehicle(String name, int cylinders, Person owner) {

    this.name = name;

    this.cylinders = cylinders;

    this.owner = owner;

  }

 

  // Accessor methods

 

  // Definition of getFirstName() method

  public String getFirstName() {

    return name;

  }

 

  // Definition of getCylinders() method

  public int getCylinders() {

    return cylinders;

  }...

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