Java BufferedReader create from FileReader

import java.io.BufferedReader;
import java.io.FileReader;

public class Main {
  public static void main(String[] args) throws Exception {
    BufferedReader in = new BufferedReader(new FileReader("Main.java"));
    String s, s2 = new String();
    while ((s = in.readLine()) != null)
      s2 += s + "\n";
    System.out.println(s2);/*from  w  w w  .  j av  a 2s  . c  o  m*/
    in.close();

  }
}