Coding To read no.of lines in a file

package lines;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.LineNumberReader;

public class myclass

{

public static void main(String[] args)

{

try

{

BufferedReader bufferobject = new BufferedReader(new InputStreamReader(System.in));

System.out.println("Please enter file name with extension:");

String file_name = bufferobject.readLine();// To get the file name

File file = new File(file_name );

if (file.exists())//check whether the file is exist or not

{

FileReader filereader = new FileReader(file);

LineNumberReader ln = new LineNumberReader(filereader);//line no reader to read the lines

int line_count = 0;

while (ln.readLine() != null)

{

line_count++;

}

System.out.println("Total line no: " + line_count);

ln.close();

}

else

{

System.out.println("File does not exists!");

}

}

catch(IOException raj)

{

raj.printStackTrace();

}

}

}