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Editorial Team
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Asked: 2026-05-16T21:28:51+00:00

From the javadoc of Calendar.before(Object when) : Returns whether this Calendar represents a time

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From the javadoc of Calendar.before(Object when):

Returns whether this Calendar represents a time before the time represented by the specified Object. This method is equivalent to:

compareTo(when) < 0

if and only if when is a Calendar instance. Otherwise, the method returns false.

Why does it accepts an Object if when someone passes something that’s not a Calendar instance it returns false? Why not just accepting a Calendar instance? This kept me watching for uncorrect results in a functionality for quite some time.

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1 Answer

  1. Editorial Team

    I think there is no particular reason for that. java.util.Calendar has some design issues we have have to live with, unfortunately.

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