Java String Format isDurationFormatPattern(String formatPattern)

Description

Determine if the duration format pattern is valid.

License

Open Source License

Parameter

Parameter	Description
formatPattern	pattern

Return

true --> valid, otherwise false

Declaration

public static boolean isDurationFormatPattern(String formatPattern) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.Arrays;
import java.util.List;

public class Main {
    /**//  w w  w.j  a  va2  s .com
     * Characters accepted in duration format pattern.
     */
    public static final List<String> ACCEPTED_CHAR_DURATION_PATTERN = Arrays.asList("dd", "hh", "mm", "ss");

    /**
     * Determine if the duration format pattern is valid.
     * 
     * @param formatPattern
     *          pattern
     * @return true --> valid, otherwise false
     */
    public static boolean isDurationFormatPattern(String formatPattern) {
        if (formatPattern == null) {
            return false;
        }

        final int length = formatPattern.length();
        if (length < 2) {
            return false;
        }

        formatPattern = formatPattern.toLowerCase();
        final String first = formatPattern.substring(0, 2);
        final String last = formatPattern.substring(length - 2);
        if (ACCEPTED_CHAR_DURATION_PATTERN.contains(first) && ACCEPTED_CHAR_DURATION_PATTERN.contains(last)) {
            return true;
        }
        return false;
    }
}

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