How to read a file in Java

import java.io.*;

public class InputExample {
      public static void main(String args[]) {
          try {
              // This creates an object from which you can read input lines.
              BufferedReader reader = 
                      new BufferedReader(new FileReader("Mitochondrion.txt"));

              String line = null;

              // readLine reads input lines (without the \n), catching any 
              // exceptions, and returns null if there is no more input.
              while ((line = reader.readLine()) != null)
                      System.out.println("Got: ==" + line + "==");
          }
          catch (IOException e) {
              System.out.println("Caught IO exception");
          }
      }
}