Write a Java Program that loads names and phone numbers from a text file where the data is organized as one line per record and each filed in a record are separated by a tab (\t).

Write a Java Program that loads names and phone numbers from a text file where the data is organized as one line per record and each filed in a record are separated by a tab (\t). It takes a name or phone number as input and prints the corresponding other value from the hash table (hint: use hash tables).

Program Code:

import java.io.*;

import java.util.*;

public class Phonebook

{

public static void main(String args[])

{

Try

{

FileInputStream fis=new FileInputStream("//home/gcet/Desktop/myfile.txt");

Scanner sc=new Scanner(fis).useDelimiter("\t");

Hashtable<String,String> ht=new Hashtable<String,String> ();

String[] strarray;

String a,str;

while(sc.hasNext())

{

a=sc.nextLine();

strarray=a.split("\t");

ht.put(strarray[0],strarray[1]);

System.out.println("hash table values are"+strarray[0]+":"+strarray[1]);

}

Scanner s=new Scanner(System.in);

System.out.println("Enter the name as given in the phone book");

str=s.next();

if(ht.containsKey(str))

{

System.out.println("phone no is"+ht.get(str));

}

else

{

System.out.println("Name is not matched");

}

}

catch(Exception e)

{

System.out.println(e);

}

}

}

Myfile.txt

Surya 567

Ravi 456

Sudha 678

Output:

Surya: 567

Ravi: 456

Sudha: 678

Enter the name as given in the phone book

Ravi

phone no is: 456

Enter the name as given in the phone book

Soni

Name is not matched