How to sort TreeMap in descending order in Java. A simple example using a string as keys.
How to sort objects with Comparable and Comparator in Java. Primitive array and list sorting. Java Object sorting with Comparable and Comparator.
How to compare dates in Java using Date (compareTo, before, after, equals), Calendar(before, after, equals) and LocalDate(isBefore, isAfter, equals) classes.
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