Java File Read via ByteBuffer readBytes(File f)

Description

read Bytes

License

Apache License

Declaration

public static byte[] readBytes(File f) throws IOException 

Method Source Code

//package com.java2s;
/* /*from  w w  w .ja v  a  2 s  . c o  m*/
 * Copyright 2003,2004 Peter Lee, Colin Crist
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

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

public class Main {
    public static byte[] readBytes(File f) throws IOException {
        FileInputStream fin = null;
        FileChannel ch = null;
        try {
            fin = new FileInputStream(f);
            ch = fin.getChannel();
            int size = (int) ch.size();
            MappedByteBuffer buf = ch.map(MapMode.READ_ONLY, 0, size);
            byte[] bytes = new byte[size];
            buf.get(bytes);
            return bytes;

        } finally {
            try {
                if (fin != null) {
                    fin.close();
                }
                if (ch != null) {
                    ch.close();
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }
}

Related

1. readAsByteArray(final InputStream source)
2. readBigEndianWord(byte[] buf)
3. readBinaryFile(File file)
4. readBinaryFileAsFloats(String fileName)
5. readByte(String filePath)
6. readBytes(final InputStream in, final int length)
7. readBytes(final String file)
8. readBytes(InputStream is)
9. readBytes(Path file)