mappedbytebuffer

Try this one. public class Test { public static void main(String[] args) throws Exception { String filePath = “D:/temp/file”; RandomAccessFile file = new RandomAccessFile(filePath, “rw”); FileChannel chan = file.getChannel(); try { MappedByteBuffer buffer = chan.map(FileChannel.MapMode.READ_WRITE, 0, 128); // Do something buffer.putInt(4); buffer.force(); Cleaner cleaner = ((sun.nio.ch.DirectBuffer) buffer).cleaner(); if (cleaner != null) { cleaner.clean(); } } … Read more