Map. containsKey() method is used to check whether a particular key is being mapped into the Map or not . It takes the key element as a parameter and returns True if that element is mapped in the map. Syntax: boolean containsKey(key_element)
Map. containsKey() method is used to check whether a particular key is being mapped into the Map or not . It takes the key element as a parameter and returns True if that element is mapped in the map. Syntax: boolean containsKey(key_element)