What is containsKey in Java?

HashMap containsKey() Method in Java The java. util. HashMap. containsKey() method is used to check whether a particular key is being mapped into the HashMap or not . It takes the key element as a parameter and returns True if that element is mapped in the map.

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Is sorting case sensitive?

Sorting on the basis of the ASCII values differentiates the uppercase letters from the lowercase letters, and results in a case-sensitive order . Although the results in the Ascending order column might at first appear somewhat unpredictable, they are not.

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