Java Treemap Reverse Order
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Java Treemap Reverse Order
We can also demand to return the result in reverse order, from the biggest key to the smallest. Check in javadoc what treemap does when compareto returns 0. The bellow comparator will order descending the value based on the string keys.
By default, treemap sorts the objects added to it in ascending order. //reverse treemap elements map < integer, string > reversetreemap = treemap. The reverse order or descending order of mappings are according to the descending order of keys.
Use collections.sort () method by passing converted linkedlist as 1st argument and below lambda expression for.
Treemap extends abstractmap class and implements the navigablemap interface. The descendingmap() method is used to return a reverse order view of the mappings contained in this map. The natural ordering is the ordering imposed by the objects’ own compareto method. It returns a reverse order navigableset view of the keys contained in the map.
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