Java File Read via ByteBuffer readFile(String fileName)

Description

read File

License

Open Source License

Declaration

public static ByteBuffer readFile(String fileName) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class Main {
    public static ByteBuffer readFile(String fileName) {
        ByteBuffer buf = null;//from  ww w .ja  v a 2 s .c om
        FileChannel fc = null;
        try {
            FileInputStream fis = new FileInputStream(fileName);
            fc = fis.getChannel();
            int size = (int) fc.size();
            buf = readFileFragment(fc, 0, size);
        } catch (FileNotFoundException ex) {
            System.err.printf("File `%s' not found!\n", fileName);
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            try {
                if (fc != null)
                    fc.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return buf;
    }

    public static ByteBuffer readFileFragment(FileChannel fc, long pos, int size) {
        ByteBuffer fragment = null;
        try {
            fc.position(pos);
            fragment = ByteBuffer.allocate(size);
            if (fc.read(fragment) != size)
                return null;
            fragment.rewind();
        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        }
        return fragment;
    }
}

Related

1. readFile(File file)
2. readFile(File file)
3. readFile(java.io.File file)
4. readFile(String filename)
5. readFile(String filename)
6. readFile(String filename)
7. readFile(String filePath)
8. readFile(String name)
9. readFile(String name)