How do I correctly print out a calendar in java

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I am trying to make a java method, that will print out a calendar. The method gets a year and a month value. Then it gets how many days were in that month.

I then have a loop, that creates first spaces, if the 1. of the month does not start on monday. The problem is that it prints it out like this:

MO  TU  WE  TH  FR  SO  SA
                 1   2   3   4   5   6   7  
 8   9  10  11  12  13  14
15  16  17  18  19  20  21
22  23  24  25  26  27  28
29  30  31

How would I know which days are still in the first week, and which have to be line broken to be printed in the second row?

What I have tried:

This is my code

static void izpisKoledarja(int leto, int mesec){
    java.time.YearMonth yearMonth = java.time.YearMonth.of(leto, mesec);
    int steviloDni = yearMonth.lengthOfMonth();
    int prviDan = java.time.LocalDate.of(leto, mesec, 01).getDayOfWeek().getValue();

    System.out.println("MO  TU  WE  TH  FR  SO  SA");

    String initialSpace = "";
    for (int i = 0; i < prviDan - 1; i++) {
        initialSpace += "    ";
    }
    System.out.print(initialSpace);

    for (int dayOfMonth = 1; dayOfMonth <= steviloDni; ) {
        for (int j = 0; j < 7 && (dayOfMonth <= steviloDni); j++) {
            System.out.printf("%2d  ", dayOfMonth);
            dayOfMonth++;
        }
        System.out.println();
    }
}

Posted 19-Mar-21 3:56am

Member 14631234

Updated 19-Mar-21 5:04am

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Comments

Richard MacCutchan 19-Mar-21 10:31am

You need to check what day of the week each date is, rather than using a simple loop. So when you have printed the date for a Sunday, you start a new line.

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Richard MacCutchan · Accepted Answer · 2021-03-19T05:04:00

Try the following:

Java

java.time.YearMonth yearMonth = java.time.YearMonth.of(leto, mesec);
int steviloDni = yearMonth.lengthOfMonth();
int prviDan = java.time.LocalDate.of(leto, mesec, 01).getDayOfWeek().getValue();
//
// add code to print the month and year details here
//
System.out.println("MO  TU  WE  TH  FR  SO  SA");

String initialSpace = "";
for (int i = 0; i < prviDan - 1; i++) {
    initialSpace += "    ";
}
System.out.print(initialSpace);

for (int dayOfMonth = 1; dayOfMonth <= steviloDni; ) {
    System.out.printf("%2d  ", dayOfMonth);
    // get the day of the week and if it is Sunday, terminate this line
    prviDan = java.time.LocalDate.of(leto, mesec, dayOfMonth).getDayOfWeek().getValue();
    if (prviDan == java.time.DayOfWeek.SUNDAY.getValue()) {
        System.out.println();
    }
    // increment to the next day of the month
    dayOfMonth++;
}
System.out.println(); // always print a blank line at the end