Java File Move move(File from, File to, boolean overwrite)

Description

Move a file from one location to another.

License

Open Source License

Parameter

Parameter	Description
from	file which should be moved.
to	desired destination of the file.
overwrite	If false, an exception will be thrown rather than overwrite a file.

Exception

Parameter	Description
IOException	if an error occurs.

Declaration

public static void move(File from, File to, boolean overwrite) throws IOException 

Method Source Code

//package com.java2s;
/*//from  w  w w . j ava 2 s  .  c o m
 * Static File routines.
 * Copyright (C) 2014-2016 Tolga Yilmaz
 * info@64bitlabs.com
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * See LICENSE.txt for details.
 */

import java.io.*;
import java.text.MessageFormat;
import java.util.ResourceBundle;
import java.util.Locale;

public class Main {
    /**
     * Locale specific strings displayed to the user.
     *
     * @since 64bitlabsutils 1.0.0
     */
    protected static ResourceBundle labels = ResourceBundle.getBundle("FileHelper", Locale.getDefault());
    /**
     * Buffer size when reading from input stream.
     *
     * @since 64bitlabsutils 1.0.0
     */
    private final static int BUFFER_SIZE = 1024;

    /**
     * Move a file from one location to another.  An attempt is made to rename
     * the file and if that fails, the file is copied and the old file deleted.
     *
     * If the destination file already exists, an exception will be thrown.
     *
     * @param from file which should be moved.
     * @param to desired destination of the file.
     * @throws IOException if an error occurs.
     *
     * @since 64bitlabsutils 1.0.0
     */
    public static void move(File from, File to) throws IOException {
        move(from, to, false);
    }

    /**
     * Move a file from one location to another.  An attempt is made to rename
     * the file and if that fails, the file is copied and the old file deleted.
     *
     * @param from file which should be moved.
     * @param to desired destination of the file.
     * @param overwrite If false, an exception will be thrown rather than overwrite a file.
     * @throws IOException if an error occurs.
     *
     * @since 64bitlabsutils 1.0.0
     */
    public static void move(File from, File to, boolean overwrite) throws IOException {
        if (to.exists()) {
            if (overwrite) {
                if (!to.delete()) {
                    throw new IOException(MessageFormat.format(labels.getString("delete" + "error"),
                            (Object[]) new String[] { to.toString() }));
                }
            } else {
                throw new IOException(MessageFormat.format(labels.getString("already" + "exists" + "error"),
                        (Object[]) new String[] { to.toString() }));
            }
        }

        if (from.renameTo(to))
            return;

        InputStream in = null;
        OutputStream out = null;
        try {
            in = new FileInputStream(from);
            out = new FileOutputStream(to);
            copy(in, out);
            in.close();
            in = null;
            out.flush();
            out.close();
            out = null;
            if (!from.delete()) {
                throw new IOException(MessageFormat.format(labels.getString("delete" + "original" + "error"),
                        (Object[]) new String[] { from.toString(), to.toString() }));
            }
        } finally {
            if (in != null) {
                in.close();
                in = null;
            }
            if (out != null) {
                out.flush();
                out.close();
                out = null;
            }
        }
    }

    /**
     * Copy the data from the input stream to the output stream.
     *
     * @param in data source
     * @param out data destination
     * @throws IOException in an input or output error occurs
     *
     * @since 64bitlabsutils 1.0.0
     */
    private static void copy(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[BUFFER_SIZE];
        int read;
        while ((read = in.read(buffer)) != -1) {
            out.write(buffer, 0, read);
        }
    }
}

Related

1. moveTo(File file, String distDir)