java - How to Compare Dates and Times? -

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how can compare whether 2 datetimes same or @ least overlap?

for example, let's have following 2 sets of start , stop times:

start time: 2011-07-21 9:00am stop time: 2011-07-21 10:00am

start time: 2011-07-21 9:05am stop time: 2011-07-21 10:30am

the datetimes not match exactly, can't straight equality test. however, purposes datetimes overlap sufficient deemed match, how can test type of overlap?

i highly recommend use jodatime , overlap method.

from javadoc, not tell if 2 intervals overlap. tells overlapping interval is.

returns: overlap interval, null if no overlap


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