Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.File;

import java.util.Date;

public class Main {
    /**
     * Tests if the specified <code>File</code> is older than the reference
     * <code>File</code>.
     *
     * @param file      the <code>File</code> of which the modification date must
     *                  be compared, must not be {@code null}
     * @param reference the <code>File</code> of which the modification date
     *                  is used, must not be {@code null}
     * @return true if the <code>File</code> exists and has been modified before
     * the reference <code>File</code>
     * @throws IllegalArgumentException if the file is {@code null}
     * @throws IllegalArgumentException if the reference file is {@code null} or doesn't exist
     */
    public static boolean isFileOlder(File file, File reference) {
        if (reference == null) {
            throw new IllegalArgumentException("No specified reference file");
        }
        if (!reference.exists()) {
            throw new IllegalArgumentException("The reference file '" + reference + "' doesn't exist");
        }
        return isFileOlder(file, reference.lastModified());
    }

    /**
     * Tests if the specified <code>File</code> is older than the specified
     * <code>Date</code>.
     *
     * @param file the <code>File</code> of which the modification date
     *             must be compared, must not be {@code null}
     * @param date the date reference, must not be {@code null}
     * @return true if the <code>File</code> exists and has been modified
     * before the given <code>Date</code>.
     * @throws IllegalArgumentException if the file is {@code null}
     * @throws IllegalArgumentException if the date is {@code null}
     */
    public static boolean isFileOlder(File file, Date date) {
        if (date == null) {
            throw new IllegalArgumentException("No specified date");
        }
        return isFileOlder(file, date.getTime());
    }

    /**
     * Tests if the specified <code>File</code> is older than the specified
     * time reference.
     *
     * @param file       the <code>File</code> of which the modification date must
     *                   be compared, must not be {@code null}
     * @param timeMillis the time reference measured in milliseconds since the
     *                   epoch (00:00:00 GMT, January 1, 1970)
     * @return true if the <code>File</code> exists and has been modified before
     * the given time reference.
     * @throws IllegalArgumentException if the file is {@code null}
     */
    public static boolean isFileOlder(File file, long timeMillis) {
        if (file == null) {
            throw new IllegalArgumentException("No specified file");
        }
        if (!file.exists()) {
            return false;
        }
        return file.lastModified() < timeMillis;
    }
}