Java File Read via ByteBuffer readInt(InputStream in, ByteOrder order)

Description

read Int

License

Open Source License

Declaration

public static int readInt(InputStream in, ByteOrder order)
            throws IOException 

Method Source Code

//package com.java2s;
/* JKTX//from w  w  w.  j a v a  2s. co  m
 * 
 * Copyright (c) 2011 Timon Bijlsma
 *   
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License
 * as published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
    
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class Main {
    public static int readInt(InputStream in, ByteOrder order)
            throws IOException {
        ByteBuffer buf = ByteBuffer.allocate(4);
        buf.order(order);
        readFully(in, buf);
        return buf.getInt();
    }

    public static void readFully(InputStream in, ByteBuffer out)
            throws IOException {
        if (!out.hasRemaining()) {
            return;
        }

        int oldpos = out.position();
        try {
            if (out.hasArray()) {
                while (out.hasRemaining()) {
                    int r = in.read(out.array(),
                            out.arrayOffset() + out.position(),
                            out.remaining());
                    if (r < 0)
                        throw new EOFException();
                    out.position(out.position() + r);
                }
            } else {
                byte[] temp = new byte[Math.min(out.remaining(), 8192)];
                while (out.hasRemaining()) {
                    int r = in.read(temp, 0,
                            Math.min(temp.length, out.remaining()));
                    if (r < 0)
                        throw new EOFException();
                    out.put(temp, 0, r);
                }
            }
        } finally {
            out.position(oldpos);
        }
    }
}

Related

1. readInputStreamToString(InputStream inputStream)
2. readInt(byte[] bytes, int index)
3. readInt(byte[] bytes, int offset, java.nio.ByteOrder byteorder)
4. readInt(byte[] in)
5. readInt(ByteArrayInputStream bin)
6. readInt(InputStream input)
7. readInt(InputStream inputStream)
8. readInt(ReadableByteChannel channel)
9. readInt(ReadableByteChannel channel)