Java FileInputStream Read readFile(String name)

Description

Read whole file.

License

Open Source License

Parameter

Parameter	Description
name	file name

Return

contents of file as byte array

Declaration

public static byte[] readFile(String name) throws IOException 

Method Source Code

//package com.java2s;
/*/*  www .j a  va 2s.  c o m*/
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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

public class Main {
    /**
     * Read whole file.
     *
     * @param file file
     * @return contents of file as byte array
     */
    public static byte[] readFile(File file) throws IOException {
        InputStream in = new FileInputStream(file);
        long countl = file.length();
        if (countl > Integer.MAX_VALUE) {
            throw new IOException("File is too huge");
        }
        int count = (int) countl;
        byte[] buffer = new byte[count];
        int n = 0;
        try {
            while (n < count) {
                int k = in.read(buffer, n, count - n);
                if (k < 0) {
                    throw new IOException("Unexpected EOF");
                }
                n += k;
            }
        } finally {
            in.close();
        }
        return buffer;
    }

    /**
     * Read whole file.
     *
     * @param name file name
     * @return contents of file as byte array
     */
    public static byte[] readFile(String name) throws IOException {
        return readFile(new File(name));
    }
}

Related

1. readFile(String filePathName)
2. readFile(String fname)
3. readFile(String fname)
4. readFile(String fname)
5. readFile(String imageName)
6. readFile(String path)
7. Readfile(String path)
8. readFile(String path)
9. readFile(String path)