MappedByteBuffer: force() : MappedByteBuffer « java.nio « Java by API

1. Java by API
2. java.nio
3. MappedByteBuffer

MappedByteBuffer: force()

 

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();
  }
}

   
  

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