Java Convert via ByteBuffer toMappedBuffer(File file)

Description

to Mapped Buffer

License

Open Source License

Declaration

public static ByteBuffer toMappedBuffer(File file) throws IOException 

Method Source Code

//package com.java2s;
//  are made available under the terms of the Eclipse Public License v1.0

import java.io.File;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;

import java.nio.file.StandardOpenOption;

public class Main {
    public static ByteBuffer toMappedBuffer(File file) throws IOException {
        try (FileChannel channel = FileChannel.open(file.toPath(), StandardOpenOption.READ)) {
            return channel.map(MapMode.READ_ONLY, 0, file.length());
        }/*from  w  w w  .  j  a va  2s. c  o m*/
    }

    /** Get remaining from null checked buffer
     * @param buffer The buffer to get the remaining from, in flush mode.
     * @return 0 if the buffer is null, else the bytes remaining in the buffer.
     */
    public static int length(ByteBuffer buffer) {
        return buffer == null ? 0 : buffer.remaining();
    }
}

Related

1. toLong(byte[] array)
2. toLong(byte[] bytes)
3. toLongArray(byte[] b)
4. ToLongArray(byte[] data)
5. toLongArray(byte[] ids)
6. toMappedBuffer(File file)
7. toMappedBuffer(File file, long start, long end)
8. toMsftBinary(UUID uuid)
9. toShort(byte firstByte, byte secondByte)