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create a hashtable in java.
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a hashtable in java can be created using the java.util.hashtable class. the hashtable class is a concrete implementation of the map interface and provides the base for adding and looking up key/value pairs. the keys must be objects, and the values can be either objects or primitive data types such as int, boolean, and double. to create a hashtable, first create a new instance of the hashtable class, then use the put() and get() methods to add and retrieve key/value pairs.
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