Java tutorial
import java.io.File; import java.io.FileOutputStream; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; public class Main { public static void main(String[] argv) throws Exception { ByteBuffer bbuf = ByteBuffer.allocate(100); File file = new File("filename"); boolean append = false; FileChannel wChannel = new FileOutputStream(file, append).getChannel(); wChannel.write(bbuf); wChannel.close(); } }