How to count LOC of a program Using Java

Here i am using file method to get the number of lines. First you have to create file and put your programs inside that file. here i created a file program1. so in my output you can see the prgrams written in program1 file. By using this program that i explained below you can easily call the created files and easily you will get the LOC.

import java.io.*;
import java.util.*;
public class Read {
public static void main(String[] args) throws IOException{
Scanner input= new Scanner(System.in);
System.out.print("Please enter the file name to Open : ");
String file_name = input.nextLine();
FileInputStream fstream = new FileInputStream(file_name);
DataInputStream in = new DataInputStream(fstream);
BufferedReader br1 = new BufferedReader(new InputStreamReader(in));
String strLine;
int count = 0;
int count2 = 0;
//Read File Line By Line
while ((strLine = br1.readLine()) != null) {
    if (strLine.trim().length() != 0){
        System.out.println(strLine);   
        count++;
        }else{
        count2++;
        }
// Print the content on the console
//System.out.println (strLine);
}
//Close the input stream

System.out.println("number of lines:" + count);
System.out.println("number of Spaces:" + count2);

in.close();
System.out.println("File read successfully.");
}
}

Output:  


Please enter the file name to Open : program1
/*
// this is my sample program to count LOC,
import java.io.*;
public class Test{
public static void main(String[] args) throws IOException{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Please enter the file name to create : ");
String file_name = in.readLine();
File file = new File(file_name);
boolean exist = file.createNewFile();
if (!exist){
System.out.println("File already exists.");
System.exit(0);}
else{
FileWriter fstream = new FileWriter(file_name);
BufferedWriter out = new BufferedWriter(fstream);
out.write(in.readLine());
out.close();
System.out.println("File created successfully.");
}}}

*/


number of lines:18
number of Spaces:17
File read successfully.