new Date(new Date().getTime()-25 * 24 * 60 * 60 * 1000) got unexpected date

Question

I would like to generate a list of dates, but found out the date is wrong start from - 25 * 24 * 60 * 60 * 1000

My local date is 2016-07-17. I got

2016-         


        

Answer 1

java.time

Much easier to use minusDays( 1 ) on java.time.LocalDate.

LocalDate today = LocalDate.now(); // Better to pass the optional `ZoneId`.
for (int i=0; i<240; i++) {
    LocalDate localDate = today.minusDays( i );
    System.out.println( localDate.toString() );
    …
}

Back-ported to Android

Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport and further adapted to Android in ThreeTenABP.