Java Month Number Get getMonthIndex(String str)

Description

simple little function to get the index of the month.

License

Open Source License

Parameter

Parameter	Description
str	a string which (should be) a month

Return

one based index

Declaration

private static int getMonthIndex(String str) 

Method Source Code

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

public class Main {
    private static final String strMonths[] = { "January", "February",
            "March", "April", "May", "June", "July", "August", "September",
            "October", "November", "December" };

    /**//  w w w  .j a v a 2 s  . c o  m
     * simple little function to get the index of the month.
     * compare just the first three letters to avoid confusion with
     * misspellings and whether or not abreviations have a period.
     * also allow for 1 based indexs
     * @param str a string which (should be) a month
     * @return one based index
     */
    private static int getMonthIndex(String str) {
        int ix;
        int iValue;

        if (str == null || str.length() == 0)
            return (-1);
        str = str.trim();
        if (str.length() > 3)
            str = str.substring(0, 3);
        for (ix = 0; ix < strMonths.length; ++ix) {
            if (str.equalsIgnoreCase(strMonths[ix].substring(0, 3)))
                return (ix);
        }

        // if the month value does not match one of the three letter
        // abreviations it may be the 1 based index of the month

        try {
            iValue = Integer.parseInt(str);
        } catch (NumberFormatException nfe) {
            return (-1);
        }

        while (iValue < 1)
            iValue += 12;
        while (iValue > 12)
            iValue -= 12;
        return (iValue - 1);
    }
}

Related

1. eemonth(double serial_number)
2. getInitialsByMonthNumber(String monthNumber)
3. getMonthDigit(String month)
4. getMonthIds()
5. getMonthIndexAsString(String type)
6. getMonthNumberByMonthInitials(String monthInitials)
7. getMonthNumberString(int month)
8. getMonthNumberString(String sMonth)