get day of programmer by using Russia Gregorian Calendar * 256th day of program

nodoctoranymore2025-06-19 9:41
ini 复制代码 
/**
 * get day of programmer by using Russia Gregorian Calendar
 * 256th day of programmer in this input year
 * output date format : dd.mm.yyyy
 * @param year
 * @return
 */
public static String dayOfProgrammerGregorian(int year) {
    if (!checkIsGregorianYear(year)) {
        return null;
    }
    StringBuilder stringBuilder = new StringBuilder();
    stringBuilder.append(year);
    stringBuilder.append("-");
    if (checkIsLeapYear(year)) {
        // Jan31 Feb29 March31 April30 May31 June30 July31 August31 Sept30 Octor31 Norve30 Decem31
        int daySum=0;
        for (int i = 0; i < 12; i++) {
            int yearMonth=i+1;
            if(yearMonth==GregorianCalendarMonthEnum.JAN.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<29){
                    stringBuilder.append(GregorianCalendarMonthEnum.FEB.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.FEB.getMonthVal()){
                daySum+=29;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.MAR.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.MAR.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.APR.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.APR.getMonthVal()){
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.MAY.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.MAY.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.JUN.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.JUN.getMonthVal()){
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.JUL.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.JUL.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.AUG.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if(yearMonth==GregorianCalendarMonthEnum.AUG.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.SEP.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.SEP.getMonthVal()){
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.OCT.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if (yearMonth==GregorianCalendarMonthEnum.OCT.getMonthVal()) {
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.NOV.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if (yearMonth==GregorianCalendarMonthEnum.NOV.getMonthVal()) {
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.DEC.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if (yearMonth==GregorianCalendarMonthEnum.DEC.getMonthVal()) {
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.DEC.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }
        }
    }else {
        int daySum=0;
        for (int i = 0; i < 12; i++) {
            int yearMonth=i+1;
            if(yearMonth==GregorianCalendarMonthEnum.JAN.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<28){
                    stringBuilder.append(GregorianCalendarMonthEnum.FEB.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.FEB.getMonthVal()){
                daySum+=28;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.MAR.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.MAR.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.APR.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.APR.getMonthVal()){
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.MAY.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.MAY.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.JUN.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.JUN.getMonthVal()){
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.JUL.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.JUL.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.AUG.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if(yearMonth==GregorianCalendarMonthEnum.AUG.getMonthVal()){
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.SEP.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }else if(yearMonth==GregorianCalendarMonthEnum.SEP.getMonthVal()){
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.OCT.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if (yearMonth==GregorianCalendarMonthEnum.OCT.getMonthVal()) {
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<30){
                    stringBuilder.append(GregorianCalendarMonthEnum.NOV.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if (yearMonth==GregorianCalendarMonthEnum.NOV.getMonthVal()) {
                daySum+=30;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.DEC.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            } else if (yearMonth==GregorianCalendarMonthEnum.DEC.getMonthVal()) {
                daySum+=31;
                if (daySum>CalendarConstant.WHICHDAYOFPROGRAMMER){
                    break;
                }
                int i1 = CalendarConstant.WHICHDAYOFPROGRAMMER - daySum;
                if (i1<31){
                    stringBuilder.append(GregorianCalendarMonthEnum.DEC.getKey());
                    stringBuilder.append("-");
                    stringBuilder.append(i1);
                    break;
                }
                continue;
            }
        }
    }
    String stringBuilderString = stringBuilder.toString();
    String[] split = stringBuilderString.split("-");
    //date format: dd.mm.yyyy
    StringBuilder stringBuilder1 = new StringBuilder();
    for (int i = split.length-1; i > 0; i++) {
        stringBuilder1.append(split[i]);
        stringBuilder1.append(".");
    }
    stringBuilder1.substring(0, stringBuilder1.length());
    return stringBuilder1.toString();
}
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