Java Is Same File isSame(File fileA, File fileB)

Description

is Same

License

Open Source License

Declaration

public static boolean isSame(File fileA, File fileB) 

Method Source Code

//package com.java2s;
/*/*from w ww. ja va 2  s .  c o m*/
 * This software is OSI Certified Open Source Software
 * 
 * The MIT License (MIT)
 * Copyright 2000-2001 by Wet-Wired.com Ltd., Portsmouth England
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a 
 * copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the 
 * Software is furnished to do so, subject to the following conditions: 
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software. 
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
 * EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 * 
 */

import java.io.*;

public class Main {
    public static boolean isSame(File fileA, File fileB) {
        try {
            if (!fileA.exists() || !fileB.exists()) {
                return false;
            }

            if (fileA.length() != fileB.length()) {
                return false;
            }

            FileInputStream iStreamA = new FileInputStream(fileA);
            FileInputStream iStreamB = new FileInputStream(fileB);

            int inA = iStreamA.read();
            int inB = iStreamB.read();
            boolean same = true;

            while (inA != -1 && inB != -1) {
                if (inA != inB) {
                    same = false;
                    break;
                }
                inA = iStreamA.read();
                inB = iStreamB.read();
            }

            iStreamA.close();
            iStreamB.close();
            return same;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
}

Related

1. isSame(File file1, File file2)
2. isSame(File file1, File file2)