Java Day in Month getPreMonthDayStr(String curday)

Description

get Pre Month Day Str

License

Apache License

Declaration

public static String getPreMonthDayStr(String curday) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {

    public static String getPreMonthDayStr(String curday) {
        int year = getYear(curday);
        String monthStr = getMonth(curday);
        int month = Integer.parseInt(monthStr);
        if (month <= 1) {
            month = 12;// w  w  w . j  a  va2s .c  o  m
            year = year - 1;
        } else
            month = month - 1;
        monthStr = String.valueOf(month);
        if (monthStr.length() == 1)
            monthStr = "0" + monthStr;
        return year + "-" + monthStr + "-01";

    }

    public static int getYear(String day) {
        if (day == null)
            return 0;
        if (day.length() < 8)
            return 0;
        return Integer.parseInt(day.substring(0, 4));
    }

    public static String getMonth(String day) {
        if (day == null)
            return "0";
        if (day.length() < 8)
            return "0";
        int m = day.indexOf("-", 0);
        int n = day.lastIndexOf("-");
        String temp = day.substring(m + 1, n);
        if (temp.length() == 1)
            temp = "0" + temp;
        return temp;
    }
}

Related

1. getMonthlyCronExpression(int minutes, int hours, int dayOfMonth)
2. getMonthOfDayMark(int day)
3. getNumberOfDaysInMonth(Integer year, Integer month)
4. getNumberOfDaysInMonthes(int theyear)
5. getNumDaysInMonth(String monthID, String yearID)
6. getStartMonthDayOfDate(String yyyyMM)
7. is31DaysMonth(int month)
8. isDayMonth(String types)
9. isDayOfMonth(int num)