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Commons IO example source code file (LastModifiedFileComparator.java)
The Commons IO LastModifiedFileComparator.java source code/* * 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. */ package org.apache.commons.io.comparator; import java.io.File; import java.io.Serializable; import java.util.Comparator; /** * Compare the <b>last modified date/time of two files for order * (see {@link File#lastModified()}). * <p> * This comparator can be used to sort lists or arrays of files * by their last modified date/time. * <p> * Example of sorting a list of files using the * {@link #LASTMODIFIED_COMPARATOR} singleton instance: * <pre> * List<File> list = ... * LastModifiedFileComparator.LASTMODIFIED_COMPARATOR.sort(list); * </pre> * <p> * Example of doing a <i>reverse sort of an array of files using the * {@link #LASTMODIFIED_REVERSE} singleton instance: * <pre> * File[] array = ... * LastModifiedFileComparator.LASTMODIFIED_REVERSE.sort(array); * </pre> * <p> * * @version $Revision: 721626 $ $Date: 2008-11-29 04:46:54 +0000 (Sat, 29 Nov 2008) $ * @since Commons IO 1.4 */ public class LastModifiedFileComparator extends AbstractFileComparator implements Serializable { /** Last modified comparator instance */ public static final Comparator<File> LASTMODIFIED_COMPARATOR = new LastModifiedFileComparator(); /** Reverse last modified comparator instance */ public static final Comparator<File> LASTMODIFIED_REVERSE = new ReverseComparator(LASTMODIFIED_COMPARATOR); /** * Compare the last the last modified date/time of two files. * * @param file1 The first file to compare * @param file2 The second file to compare * @return a negative value if the first file's lastmodified date/time * is less than the second, zero if the lastmodified date/time are the * same and a positive value if the first files lastmodified date/time * is greater than the second file. * */ public int compare(File file1, File file2) { long result = file1.lastModified() - file2.lastModified(); if (result < 0) { return -1; } else if (result > 0) { return 1; } else { return 0; } } } Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO LastModifiedFileComparator.java source code file: |
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