java - Detect invalid date on Calendar.set() -

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i have method returns me date() changed 1 of it's "fields" (day, month, year).

public static date getdatechanged(date date, int field, int value) {     calendar cal = calendar.getinstance();     cal.settime(date);     cal.set(field, value);     return cal.gettime(); }

however, cal.set() unable give exception when field trying set not compatible date in question. so, in case:

date date = new date(); date = getdatechanged(date, calendar.day_of_month, 29);  date = getdatechanged(date, calendar.month, 1); // feb

date is, in end, 01/03/15, because calendar.set() detects february can't set day 29, automatically set's date next possible day (i thinks how routine works).

this not bad, however, in case,

i want detect date i'm trying build impossible , then start decrementing day, in case i'm trying achieve 28/02/15, how can this?

example:

29/02/15 ===> 28/02/15

you can use cal.getactualmaximum(calendar.day_of_month) find maximum days in given month calendar instance.

this way, can handle case mentioned above yourself.

also see answer here: number of days in particular month of particular year?


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