Load text from a file using buffer in Java

//from   w ww .  j a  v  a  2 s .c  om
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

public class Main {
  public static void main(String[] argv) throws Exception {
    File f = new File("main.java");
    FileReader fr = new FileReader(f);
    BufferedReader br = new BufferedReader(fr);

    StringBuffer sb = new StringBuffer();
    String eachLine = br.readLine();

    while (eachLine != null) {
      sb.append(eachLine);
      sb.append("\n");
      eachLine = br.readLine();
    }
    System.out.println(sb.toString());
  }

}