Need someone to write JAVADOC for this coding? ---------------------------------

Question

Need someone to write JAVADOC for this coding?

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

package com.koothada;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;
class Contact
{
String FirstName;
String LastName;
long PhoneNumber;
public Contact(String FirstName, String LastName,Long PhoneNumber)
{
this.FirstName=FirstName;
this.LastName=LastName;
this.PhoneNumber=PhoneNumber;
}
@Override
public String toString() {
return "Contact [FirstName=" + FirstName + ", LastName=" + LastName
+ ", PhoneNumber=" + PhoneNumber + "]";
}
}
public class ContactApp
{
public static void main(String[] args) throws FileNotFoundException
{
Scanner sc=new Scanner(System.in);
ArrayList<Contact>list=new ArrayList<Contact>();//create a Array list to Store All the Contact Details
File contact_details = new File ("F:\Workspace_Luna\Contactlist.txt");//Reading Contact details from the File
Scanner scanner = new Scanner(contact_details);
String Firstname,Lastname;
long Phone;
Contact contactlist;
while(scanner.hasNextLine())
{
Firstname = scanner.next();//Read First word of line in file as FirstName
Lastname = scanner.next();//Read Second word of line in a File as Second Name
Phone=scanner.nextLong();//Read the Third word of line as Phone Number
contactlist=new Contact(Firstname,Lastname,Phone);//Passing Input parameters through Constructor reading from the File.
//or Otherwise your wish Pass Arguments through the Constructor only
//like contactlist=new Contact("venkanna","Koothada",9949468557);
list.add(contactlist);
}
scanner.close();
System.out.println("The contact Details from the file is");
for(Contact obj:list)
{
System.out.println("FirstName: "+obj.FirstName+" LastName: "+obj.LastName+"PhoneNumber:"+obj.PhoneNumber);
}
//Or Use toString Method to print All the contact information.
//System.out.println(contactlist);
while(true)
{
System.out.println("*** Main Menu ****");
System.out.println("1.Add New Contact");
System.out.println("2.Search Contact");
System.out.println("3.Edit Contact");
System.out.println("4.Exit");
System.out.println("please Select any option");
int option=sc.nextInt();
boolean status = false;
switch(option)
{
case 1:
System.out.println("Please Enter Firstname:");
Firstname=sc.next();
System.out.println("Please enter LastName:");
Lastname=sc.next();
System.out.println("Please Enter MobileNumber");
Phone=sc.nextLong();
contactlist=new Contact(Firstname,Lastname,Phone);
list.add(contactlist);
System.out.println("New Contact Details Are Added Successfully");
break;
case 2:
System.out.println("Please Enter Phone Number");
Phone=sc.nextLong();
for(Contact obj:list)
{
if(Phone==obj.PhoneNumber)
{
status=true;
System.out.println("FirstName: "+obj.FirstName);
System.out.println("LastName: "+obj.LastName);
break;
}
}
if(status==false)
System.out.println("Contact Details are not found");
break;
case 3:
System.out.println("Please Enter Phone Number");
Phone=sc.nextLong();
for(Contact obj:list)
{
if(Phone==obj.PhoneNumber)
{
status=true;
System.out.println("FirstName: "+obj.FirstName);
System.out.println("LastName: "+obj.LastName);
System.out.println("Please Enter New Mobile/Phone Number:");
Phone=sc.nextLong();
obj.PhoneNumber=Phone;
System.out.println("New Phone Number Updated Successfully");
break;
}
}
if(status==false)
System.out.println("Contact Details are not found");
break;
case 4:
System.out.println("Terminated Successfully");
System.exit(0);
default:
System.out.println("Invalid Option please try again");
}
sc.close();
}
}
}

Explanation / Answer

Please find the JAVADOC for the following code:-

package com.koothada;

import java.io.File;

import java.io.FileNotFoundException;

import java.util.ArrayList;

import java.util.Scanner;

/**

* @author gmalaker

* @version 1.0

*/

class Contact {

String FirstName;

String LastName;

long PhoneNumber;

/**

* @param FirstName - the First name of Contact

* @param LastName - the Last name of Contact

* @param PhoneNumber - the PhoneNumber of Contact

*/

public Contact(String FirstName, String LastName, Long PhoneNumber) {

this.FirstName = FirstName;

this.LastName = LastName;

this.PhoneNumber = PhoneNumber;

}

/**

* @return String

*/

@Override

public String toString() {

return "Contact [FirstName=" + FirstName + ", LastName=" + LastName + ", PhoneNumber=" + PhoneNumber + "]";

}

}

public class ContactApp {

/**

* @param args

* @throws FileNotFoundException

*/

public static void main(String[] args) throws FileNotFoundException {

Scanner sc = new Scanner(System.in);

ArrayList<Contact> list = new ArrayList<Contact>();// create a Array

// list to Store All

// the Contact

// Details

File contact_details = new File("F:\Workspace_Luna\Contactlist.txt");// Reading

// Contact

// details

// from

// the

// File

Scanner scanner = new Scanner(contact_details);

String Firstname, Lastname;

long Phone;

Contact contactlist;

while (scanner.hasNextLine()) {

Firstname = scanner.next();// Read First word of line in file as

// FirstName

Lastname = scanner.next();// Read Second word of line in a File as

// Second Name

Phone = scanner.nextLong();// Read the Third word of line as Phone

// Number

contactlist = new Contact(Firstname, Lastname, Phone);// Passing

// Input

// parameters

// through

// Constructor

// reading

// from the

// File.

// or Otherwise your wish Pass Arguments through the Constructor

// only

// like contactlist=new Contact("venkanna","Koothada",9949468557);

list.add(contactlist);

}

scanner.close();

System.out.println("The contact Details from the file is");

for (Contact obj : list) {

System.out.println(

"FirstName: " + obj.FirstName + " LastName: " + obj.LastName + "PhoneNumber:" + obj.PhoneNumber);

}

// Or Use toString Method to print All the contact information.

// System.out.println(contactlist);

while (true) {

System.out.println("*** Main Menu ****");

System.out.println("1.Add New Contact");

System.out.println("2.Search Contact");

System.out.println("3.Edit Contact");

System.out.println("4.Exit");

System.out.println("please Select any option");

int option = sc.nextInt();

boolean status = false;

switch (option) {

case 1:

System.out.println("Please Enter Firstname:");

Firstname = sc.next();

System.out.println("Please enter LastName:");

Lastname = sc.next();

System.out.println("Please Enter MobileNumber");

Phone = sc.nextLong();

contactlist = new Contact(Firstname, Lastname, Phone);

list.add(contactlist);

System.out.println("New Contact Details Are Added Successfully");

break;

case 2:

System.out.println("Please Enter Phone Number");

Phone = sc.nextLong();

for (Contact obj : list) {

if (Phone == obj.PhoneNumber) {

status = true;

System.out.println("FirstName: " + obj.FirstName);

System.out.println("LastName: " + obj.LastName);

break;

}

}

if (status == false)

System.out.println("Contact Details are not found");

break;

case 3:

System.out.println("Please Enter Phone Number");

Phone = sc.nextLong();

for (Contact obj : list) {

if (Phone == obj.PhoneNumber) {

status = true;

System.out.println("FirstName: " + obj.FirstName);

System.out.println("LastName: " + obj.LastName);

System.out.println("Please Enter New Mobile/Phone Number:");

Phone = sc.nextLong();

obj.PhoneNumber = Phone;

System.out.println("New Phone Number Updated Successfully");

break;

}

}

if (status == false)

System.out.println("Contact Details are not found");

break;

case 4:

System.out.println("Terminated Successfully");

System.exit(0);

default:

System.out.println("Invalid Option please try again");

}

sc.close();

}

}

}

Please let me know in case of any clarifications required. Thanks!

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