Java FileChannel get from RandomAccessFile

import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;

public class Main {
  public static void main(String[] args) throws Exception {
    // Create a random access file and obtain a channel for it
    RandomAccessFile raf = new RandomAccessFile("Main.java", "rw");
    FileChannel fileChannel = raf.getChannel();

    fileChannel.close();// ww w. j  a  v a 2s  . com

    raf.close();
  }
}