Parses a string of type "1y2mo3w4d5h6m7s", where the units represent years, months, weeks, days, hours, minutes and second respectively. - Java java.util

Java examples for java.util:Calendar Format

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Description

Parses a string of type "1y2mo3w4d5h6m7s", where the units represent years, months, weeks, days, hours, minutes and second respectively.

Demo Code

/*/*from  ww  w  .jav a 2s.com*/
 * Syncany, www.syncany.org
 * Copyright (C) 2011-2014 Philipp C. Heckel <philipp.heckel@gmail.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 3 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] argv) throws Exception {
        String period = "java2s.com";
        System.out.println(parseTimePeriod(period));
    }

    /**
     * Parses a string of type "1y2mo3w4d5h6m7s", where the units represent
     * years, months, weeks, days, hours, minutes and second respectively.
     * 
     * returns: the duration of the period represented by the string in seconds.
     */
    public static long parseTimePeriod(String period) {
        Pattern relativeDatePattern = Pattern
                .compile("(\\d+(?:[.,]\\d+)?)(mo|[smhdwy])");
        Matcher relativeDateMatcher = relativeDatePattern.matcher(period);

        relativeDateMatcher.reset();
        long periodSeconds = 0;

        while (relativeDateMatcher.find()) {
            double time = Double.parseDouble(relativeDateMatcher.group(1));
            String unitStr = relativeDateMatcher.group(2).toLowerCase();
            int unitMultiplier = 0;

            if (unitStr.startsWith("mo")) {
                unitMultiplier = 30 * 24 * 60 * 60;
            } // must be before "m"
            else if (unitStr.startsWith("s")) {
                unitMultiplier = 1;
            } else if (unitStr.startsWith("m")) {
                unitMultiplier = 60;
            } else if (unitStr.startsWith("h")) {
                unitMultiplier = 60 * 60;
            } else if (unitStr.startsWith("d")) {
                unitMultiplier = 24 * 60 * 60;
            } else if (unitStr.startsWith("w")) {
                unitMultiplier = 7 * 24 * 60 * 60;
            } else if (unitStr.startsWith("y")) {
                unitMultiplier = 365 * 24 * 60 * 60;
            }

            periodSeconds += (long) ((double) time * unitMultiplier);
        }

        return periodSeconds;
    }
}

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