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Java Array Of Maps . A map is useful if you have to search, update or delete elements on the basis of a key. In java, we must import the java.util.map package in order to use map. how to print the map in java Code Example from www.codegrepper.com All of those interfaces extend from the main interface collection, except the map interface. An array is a collection of elements of the same data type. Java queue collection tutorial and examples;