Create a new Java project called inlab4. b) Create a package called model and a

ID: 3574169 • Letter: C

Question

Create a new Java project called inlab4. b) Create a package called model and a package called test. c) In the model package, add the following class: package model; import java.util.ArrayList; public abstract class Person {private int id; private String name; private static ArrayList persons=new ArrayList(); public Person(int id, String name) {this.id = id; this.name = name; persons.add(this);} public int getId() {return id;} public void setId(int id) {this.id = id;} public String getName() {return name;} public void setName(String name) {this.name = name;} public static ArrayList getPersons() {return persons;} public abstract String getClassName(); public String toCSV() {return id + ", " + name +", "+getClassName();}}

Explanation / Answer

Please follow the code and comments for description :

CODE :

package model; // required package

import java.util.ArrayList; // required imports

public abstract class Person { // abstract class

    private int id; // instance variables
    private String name;
    private static ArrayList<Person> persons = new ArrayList<>();

    public Person(int id, String name) { // argument constructor
        this.id = id;
        this.name = name;
        persons.add(this); // add the data to the list
    }

   // getters and setters for the instance variables respectively

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public static ArrayList<Person> getPersons() {
        return persons;
    }

public abstract String getClassName(); // method that return the class name

    public String toCSV() { // method that return the data required
        return id + "." + name + "," + getClassName();
    }
}

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