Java calculates lunar calendar date

Import java.util.scanner; Public class PrintCalendar {/**

* @param args

*/

Public static void main(String[] args) {

System. out . println(" * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ")；

Scanner input = new scanner (system. in);

System.out.print ("\ nPlease select year:");

int year = input . nextint()；

System.out.print ("\ nPlease select the month:");

int month = input . nextint()；

system . out . println()； int days = 0； //Store the date of the current month.

Boolean isRn

/* Judge whether it is a leap year */

If (year% 4 = = 0 & amp& amp (year%100 = = 0) || year% 400 = = 0) {//Judge whether it is a leap year.

IsRn = true// leap year

} Otherwise {

IsRn = false// average year

}/* Calculate the number of days before entering the year */

int total days = 0；

for(int I = 1900； My< year; i++) {

/* Judge leap year or average year and accumulate days */

if(I % 4 = = 0 & amp； & amp！ (i% 100 == 0) || i% 400 == 0) {// Judge whether it is a leap year.

Total days = total days+366; //leap year 366 days

} Otherwise {

Total days = total days+365; //365 days in normal year

}

}/* Calculate the number of days before the input month */

int before days = 0；

for(int I = 1； I < = month; i++) {

Switch (i) (

Case 1:

Case 3:

Case 5:

Case 7:

Case 8:

Case 10:

Case 12:

Days = 31;

Break;

Case 2:

if (isRn) {

Days = 29;

} Otherwise {

Days = 28;

}

Break;

Default value:

Days = 30 days;

Break;

}

If (I< month) {

Days before = Days before+Days;

}

}

Total days = total days+previous days; //1900 65438+1October 1/* Calculate the day of the week */

Int firstDayOfMonth// stores the day of the week on the first day of the month: Sunday is 0, and Monday to Saturday is 1~6.

Int temp = 1+Total days% 7; //Calculated from 65438+65438+ 10 in 0900.

If (temp == 7) {// Find the first day of the month.

first day of month = 0； //Sunday

} Otherwise {

firstDayOfMonth = temp

}/* Output calendar */

System.out.println ("Sunday \t Monday \t Tuesday \t Wednesday \t Thursday \t Friday \t Saturday ");

for(int null no = 0； nullNo & ltfirstDayOfMonthnullNo++) {

system . out . print(" \ t ")； //output spaces

}

for(int I = 1； I<= days; i++) {

system . out . print(I+" \ t ")；

If ((total days +I- 1)% 7 = = 5){// If the day is Saturday, the output will wrap.

system . out . println()；

}

}

}

}