TreeMap headMap(K toKey boolean inclusive) method in java

Let’s learn TreeMap headMap(K toKey, boolean inclusive) method in java. TreeMap headMap(K toKey, boolean inclusive) method in java headMap(K toKey, boolean inclusive) method of TreeMap class returns a view of the portion of this map whose keys are less than (or equal to, if inclusive is true) toKey. The returned map will throw an IllegalArgumentException…

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