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SortedMap is a collection framework interface. It guarantees that the entries are kept in ascending key order. This interface is an extension of the Map interface. TreeMap is the class that implements this interface. Type Parameters: K – the type of keys maintained by this map V – the type of mapped values SortedMap’s parent interface is […]
September 15, 2022 | Java | No comments
The HashMap class is similar to the IdentityHashMap class. The IdentityHashMap implements the Map interface using Hashtable, and when comparing keys, it uses reference-equality rather than object-equality (and values). This class is not intended to be a general-purpose Map implementation. This class is used when the user wants to compare objects by reference. It is […]
September 14, 2022 | Java | 1 comment
Since Java 1.2, HashMap<K, V> class has been part of the Java collection. This class can be found in java.util package. It implements the Java Map interface in its most basic form. If you try to insert the duplicate key, it will replace the associated key’s element. The key index makes it simple to conduct […]
August 1, 2022 | Java | No comments
Java includes a map interface. A mapping between a key and a value is represented by the util package. The Collection interface does not have a subtype called Map. As a result, it operates differently than the other collection types. A map comprises distinct keys. Duplicate keys are not permitted in a Map, although duplicate […]
July 28, 2022 | Java | No comments