Hi Friend,

Try the following code:

import java.io.*;
class ReadFileUsingThread
{
    public void readFromFile(final String f1,final String f2,final String f3) {
    Runnable readRun1 = new Runnable() {
      public void run() {
          StringBuffer buffer1=new StringBuffer(10);
          try{
          Thread.sleep(5000);
          File inputFile = new File(f1);
          FileInputStream in = new FileInputStream(inputFile);
          byte bt[] =  new byte[(int)inputFile.length()];
          in.read(bt);
          buffer1.append(new String(bt));
          System.out.println(buffer1.toString());
       } catch(Exception ex) {
       }  
      }
    };
    Thread thread1 = new Thread(readRun1);
    thread1.start();

Runnable readRun2 = new Runnable() {
      public void run() {
          StringBuffer buffer2=new StringBuffer(10);
          try{
          Thread.sleep(5000);
          File inputFile = new File(f2);
          FileInputStream in = new FileInputStream(inputFile);
          byte bt[] =  new byte[(int)inputFile.length()];
          in.read(bt);
          buffer2.append(new String(bt));
          System.out.println(buffer2.toString());
       } catch(Exception ex) {
       }  
      }
    };
    Thread thread2 = new Thread(readRun2);
    thread2.start();

Runnable readRun3 = new Runnable() {
      public void run() {
          try{
          StringBuffer buffer3=new StringBuffer(10);
          Thread.sleep(5000);
          File inputFile = new File(f3);
          FileInputStream in = new FileInputStream(inputFile);
          byte bt[] =  new byte[(int)inputFile.length()];
          in.read(bt);
          buffer3.append(new String(bt));
          System.out.println(buffer3.toString());
       } catch(Exception ex) {
       }  
      }
    };
    Thread thread3 = new Thread(readRun3);
    thread3.start();


  }

    public static void main(String[] args) 
    {
        ReadFileUsingThread files=new ReadFileUsingThread();
        String f1="C:/data.txt",f2="C:/employee.txt",f3="C:/hello.txt";
        files.readFromFile(f1,f2,f3);
    }
}

Hope that it will be helpful for you.

Thanks