All I want is to get passed groups of three ints ( a year, a month and a date) create some Date objects, do some simple test on them (along the lines of as date A before date B and after January 1 1990), convert them to java.sql.Date objects and pass them off to the database via JDBC.
If you want to define a week as week-of-month # 1 is the week containing day-of-month 1, then use: LocalDate::get( ChronoField.ALIGNED_WEEK_OF_MONTH ) Calendar.DAY_OF_WEEK_IN_MONTH. Obsolete, never use Calendar. Means the nth day-of-week within that month, such 2nd Tuesday, where weeks are defined as week # 1 containing day 1 of that month.
All I want is to get passed groups of three ints ( a year, a month and a date) create some Date objects, do some simple test on them (along the lines of as date A before date B and after January 1 1990), convert them to java.sql.Date objects and pass them off to the database via JDBC.
This example obtains the current date and subtracts one month. Note how it accepts an enum as the time unit: LocalDate previousMonthSameDay = LocalDate.now().minus(1, ChronoUnit.MONTHS); In the following two code examples, we parse the date “2016-06-12” and get the day of the week and the day of the month respectively.

A simple adjuster might simply set the one of the fields, such as the year field. A more complex adjuster might set the date to the last day of the month. A selection of common adjustments is provided in TemporalAdjusters. These include finding the "last day of the month" and "next Wednesday".

The java.time framework built into Java 8 and later supplants the troublesome old java.util.Date/.Calendar classes. Date-only. A LocalDate class is offered by java.time to represent a date-only value without any time-of-day or time zone. You do need a time zone to determine a date, as a new day dawns earlier in Paris than in Montréal for example.

The plusYears () method of LocalDate class in Java is used to add the number of specified years in this LocalDate and return a copy of LocalDate. Add the years to the year field. Check if the date after adding years is valid or not. If date is invalid then method adjust the day-of-month to the last valid day. For example, 2016-02-29 (leap year
Date Output. When we execute the code from the example above the result will be: 2023-12-07 16:07:32.171001. The date contains year, month, day, hour, minute, second, and microsecond. The datetime module has many methods to return information about the date object.
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    • java date year month day