/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package launcher;

/**
 *
 * @author Accounts
 */
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;


public class Launcher {

  public static void main(String[] args) {

    BlockingQueue<Integer> queue = new ArrayBlockingQueue<Integer>(1024);

    ReaderThread reader = new ReaderThread(queue);
    WriterThread writer = new WriterThread(queue);

    System.out.println("My ID is BS00000000 and special character to read is 'B'");
    new Thread(reader).start();
    new Thread(writer).start();    
    
    
    }

 } 

ReaderThread.java Class code

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package launcher;

/**
 *
 * @author Accounts
 */
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.concurrent.BlockingQueue;

public class ReaderThread implements Runnable{

  protected BlockingQueue<Integer> blockingQueue ;

  public ReaderThread(BlockingQueue<Integer> blockingQueue){
    this.blockingQueue = blockingQueue;     
  }

  @Override
  public void run() {
      
      System.out.println("Reader Thread is Started");
      
    BufferedReader br = null;
     try {
            br = new BufferedReader(new FileReader(new File("./inputFile.txt")));
            int buffer =0;
            char match = 'B';
            
            while((buffer=br.read())!= -1){
                
                if ((char)buffer == match){
                blockingQueue.put(buffer);
                }
               
            }
            
            blockingQueue.put(0);  //When end of file has been reached
             System.out.println("Reader Thread ended");
        } catch (FileNotFoundException e) {

            e.printStackTrace();
        } catch (IOException e) {

            e.printStackTrace();
        } catch(InterruptedException e){

        }finally{
            try {
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }


  }



}

WriterThread.java class code

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package launcher;

/**
 *
 * @author Accounts
 */

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.concurrent.BlockingQueue;

public class WriterThread implements Runnable{

  protected BlockingQueue<Integer> blockingQueue;

  public WriterThread(BlockingQueue<Integer> blockingQueue){
    this.blockingQueue = blockingQueue;     
  }

  @Override
  public void run() {
      
      System.out.println("Writer Thread is Started");
      
    PrintWriter writer = null;
    char match;
    int no = 0;
    try {
        writer = new PrintWriter(new File("outputFile.txt"));

        while(true){
            int buffer = blockingQueue.take();
            
            match = (char)buffer;
            no++;
            
            if(buffer == (0)){ 
                break;
            }
            
            writer.println(no);
            System.out.println("'"+match+"'" + " Found so Far :" + no);
            
        }               
        System.out.println("Writer Thread ended");
        System.out.println("Total number of Special character "+"'Blue'"+" in the file are :"+ (no-1));
    } catch (FileNotFoundException e) {

        e.printStackTrace();
    } catch(InterruptedException e){

    }finally{
        writer.close();
    } 

  }


}