(Polymorphism And Inheritance) How To Call Java Method Polymorphically

(Polymorphism And Inheritance) How To Call Java Method Polymorphically

In this case am calling toString() Method from different classes Polymorphically. I have a for loop that loops through all created objects while invoking toString() method from each class. (Employee Student Faculty Staff). I have multiple classes that inherits from one class (Person) .

SOURCE CODE

PersonEmployeeStudentFacultyStaffPolymorphismInDriver.java

/*
 * (Polymorphism And Inheritance) How To Call Java Method Polymorphically.
 * https://mauricemuteti.info/polymorphism-and-inheritance-how-to-call-java-method-polymorphically/
 */
package personemployeestudentfacultystaffpolymorphisminjava;

/**
 *
 * @author HP
 */
public class PersonEmployeeStudentFacultyStaffPolymorphismInDriver {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        //Creating Person array of size 4
        Person[] arrPerson = new Person[4];
        //create objects of each class by passing argumnents 
        //and add them in persons array.
        Person p1 = new Employee("Jane Doe", "14/02/2000", 25);
        arrPerson[0] = p1;

        Person p2 = new Faculty("John Hellen", "13/06/2001", 9);
        arrPerson[1] = p2;

        Person p3 = new Staff("Foo Bar", "12/12/2002", "IT Support");
        arrPerson[2] = p3;

        Person p4 = new Student("Adam Aden", "1107/2003", "Active");
        arrPerson[3] = p4;

        //Passing Persons array in identifyPersons() Static Method.
        identifyPersons(arrPerson);
    }

    /**
     *
     * @param personsArray
     */
    public static void identifyPersons(Person[] personsArray) {

        // using for loop display each object toString Data Polymorphically.
        for (int i = 0; i < personsArray.length; i++) {
            System.out.println("\nPerson " + (i + 1));
            //Print On The Console Using ToString Method.
            System.out.println(personsArray[i].toString());

        }

    }

}

Person.java

 /*
 * (Polymorphism And Inheritance) How To Call Java Method Polymorphically.
 * https://mauricemuteti.info/polymorphism-and-inheritance-how-to-call-java-method-polymorphically/
 */
package personemployeestudentfacultystaffpolymorphisminjava;

/**
 *
 * @author HP
 */
public class Person {

    private String name;
    private String birthDate;

    /**
     *
     * @param name
     * @param birthDate
     */
    public Person(String name, String birthDate) {
        this.name = name;
        this.birthDate = birthDate;
    }

    /**
     * Get the value of birthDate
     *
     * @return the value of birthDate
     */
    public String getBirthDate() {
        return birthDate;
    }

    /**
     * Set the value of birthDate
     *
     * @param birthDate new value of birthDate
     */
    public void setBirthDate(String birthDate) {
        this.birthDate = birthDate;
    }

    /**
     * Get the value of name
     *
     * @return the value of name
     */
    public String getName() {
        return name;
    }

    /**
     * Set the value of name
     *
     * @param name new value of name
     */
    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "Person{" + "name=" + name + ", birthDate=" + birthDate + '}';
    }

}

Employee.java

/*
 * (Polymorphism And Inheritance) How To Call Java Method Polymorphically.
 * https://mauricemuteti.info/polymorphism-and-inheritance-how-to-call-java-method-polymorphically/
 */
package personemployeestudentfacultystaffpolymorphisminjava;

/**
 *
 * @author HP
 */
public class Employee extends Person {

    private int workingDays;

    /**
     * 
     * @param name
     * @param birthDate
     * @param workingDays 
     */
    public Employee(String name, String birthDate, int workingDays) {
        super(name, birthDate);
        this.workingDays = workingDays;
    }

    /**
     * Get the value of workingDays
     *
     * @return the value of workingDays
     */
    public int getWorkingDays() {
        return workingDays;
    }

    /**
     * Set the value of workingDays
     *
     * @param workingDays new value of workingDays
     */
    public void setWorkingDays(int workingDays) {
        this.workingDays = workingDays;
    }

    @Override
    public String toString() {
        return super.toString() + " Employee{" + "workingDays=" + workingDays + '}';
    }
    
    

}
 

Student.java

 /*
 * (Polymorphism And Inheritance) How To Call Java Method Polymorphically.
 * https://mauricemuteti.info/polymorphism-and-inheritance-how-to-call-java-method-polymorphically/
 */
package personemployeestudentfacultystaffpolymorphisminjava;

/**
 *
 * @author HP
 */
public class Student extends Person {

    private String status;

    /**
     *
     * @param status
     * @param name
     * @param birthDate
     */
    public Student(String status, String name, String birthDate) {
        super(name, birthDate);
        this.status = status;
    }

    /**
     * Get the value of status
     *
     * @return the value of status
     */
    public String getStatus() {
        return status;
    }

    /**
     * Set the value of status
     *
     * @param status new value of status
     */
    public void setStatus(String status) {
        this.status = status;
    }

    @Override
    public String toString() {
        return super.toString() + " Student{" + "status=" + status + '}';
    }

}

Faculty.java

 /*
 * (Polymorphism And Inheritance) How To Call Java Method Polymorphically.
 * https://mauricemuteti.info/polymorphism-and-inheritance-how-to-call-java-method-polymorphically/
 */
package personemployeestudentfacultystaffpolymorphisminjava;

/**
 *
 * @author HP
 */
public class Faculty extends Person {

    private int officeHours;

    /**
     *
     * @param officeHours
     * @param name
     * @param birthDate
     */
    public Faculty(String name, String birthDate, int officeHours) {
        super(name, birthDate);
        this.officeHours = officeHours;
    }

    /**
     * Get the value of officeHours
     *
     * @return the value of officeHours
     */
    public int getOfficeHours() {
        return officeHours;
    }

    /**
     * Set the value of officeHours
     *
     * @param officeHours new value of officeHours
     */
    public void setOfficeHours(int officeHours) {
        this.officeHours = officeHours;
    }

    @Override
    public String toString() {
        return super.toString() + " Faculty{" + "officeHours=" + officeHours + '}';
    }

}

Staff.java

 /*
 * (Polymorphism And Inheritance) How To Call Java Method Polymorphically.
 * https://mauricemuteti.info/polymorphism-and-inheritance-how-to-call-java-method-polymorphically/
 */
package personemployeestudentfacultystaffpolymorphisminjava;

/**
 *
 * @author HP
 */
public class Staff extends Person {

    private String title;

    /**
     *
     * @param name
     * @param birthDate
     * @param title
     */
    public Staff(String name, String birthDate, String title) {
        super(name, birthDate);
        this.title = title;
    }

    /**
     * Get the value of title
     *
     * @return the value of title
     */
    public String getTitle() {
        return title;
    }

    /**
     * Set the value of title
     *
     * @param title new value of title
     */
    public void setTitle(String title) {
        this.title = title;
    }

    @Override
    public String toString() {
        return super.toString() + " Staff{" + "title=" + title + '}';
    }

}

NETBEANS OUTPUT

run:

Person 1
Person{name=Jane Doe, birthDate=14/02/2000} Employee{workingDays=25}

Person 2
Person{name=John Hellen, birthDate=13/06/2001} Faculty{officeHours=9}

Person 3
Person{name=Foo Bar, birthDate=12/12/2002} Staff{title=IT Support}

Person 4
Person{name=1107/2003, birthDate=Active} Student{status=Adam Aden}
BUILD SUCCESSFUL (total time: 0 seconds)

NETBEANS IDE OUTPUT SCREENSHOTS