I need to check if a given date falls in the current month, and I wrote the following code, but the IDE reminded me that the getMonth() and getYear() methods are obsolete. I was wondering how to do the same thing in newer Java 7 or Java 8.
private boolean inCurrentMonth(Date givenDate) {
Date today = new Date();
return givenDate.getMonth() == today.getMonth() && givenDate.getYear() == today.getYear();
}
解决方案
Time Zone
The other answers ignore the crucial issue of time zone. A new day dawns earlier in Paris than in Montréal. So at the same simultaneous moment, the dates are different, "tomorrow" in Paris while "yesterday" in Montréal.
Joda-Time
The java.util.Date and .Calendar classes bundled with Java are notoriously troublesome, confusing, and flawed. Avoid them.
Instead use either Joda-Time library or the java.time package in Java 8 (inspired by Joda-Time).
Here is example code in Joda-Time 2.5.
DateTimeZone zone = DateTimeZone.forID( "America/Montreal" );
DateTime dateTime = new DateTime( yourJUDate, zone ); // Convert java.util.Date to Joda-Time, and assign time zone to adjust.
DateTime now = DateTime.now( zone );
// Now see if the month and year match.
if ( ( dateTime.getMonthOfYear() == now.getMonthOfYear() ) && ( dateTime.getYear() == now.getYear() ) ) {
// You have a hit.
}
For a more general solution to see if a moment falls within any span of time (not just a month), search StackOverflow for "joda" and "interval" and "contain".