Question

Is there any easy library or approach to get the week (from which date ~ date) of certain periods?

Example:
There is 6 weeks(variable) (start from 1 July, 2012 ~ 11 Aug, 2012).

I want to cut off the 6 weeks into 2 portions (variable). So the results will be

1) 1 July,2012 ~ 21 July, 2012

2) 22 July,2012 ~ 11 Aug, 2012... etc

With jodatime, I can easily get the number of weeks between certain periods though.

All I know is Start Date and End Date which both are variables and cutoffweeks amount(eg.6 weeks or 4 weeks).

Answer 1

final LocalDate start = new LocalDate();
final LocalDate end3 = start.plusWeeks(3)

Its not exactly clear what you want, but Joda-Time makes most things rather easy.

I guess you need something like :

public void doStruff(int cutOff){
  int portion = cutoff/2;
  final LocalDate start = new LocalDate();
  final LocalDate end = start.plusWeeks(portion)
}