Java IO Tutorial - Java MappedByteBuffer.force()

Syntax

MappedByteBuffer.force() has the following syntax.

public final MappedByteBuffer force()

Example

In the following code shows how to use MappedByteBuffer.force() method.

/*from ww w  .  ja v a  2s  . c  o  m*/
import java.io.File;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

public class Main {
  public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();
    MappedByteBuffer buf = channel.map(FileChannel.MapMode.READ_WRITE, 0, (int) channel.size());

    buf.put(0, (byte) 0xFF);

    buf.force();

    channel.close();
  }
}