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Tag Archives: Java-HashMap

HashMap<K, V> is a part of Java’s collection since Java 1.2. This class is found in java.util package. It provides the basic implementation of the… Read More
The IdentityHashMap implements Map interface using Hashtable, using reference-equality in place of object-equality when comparing keys (and values). This class is not a general-purpose Map… Read More
HashMap is a data structure that uses a hash function to map identifying values, known as keys, to their associated values. It contains “key-value” pairs… Read More
HashMap and TreeMap are part of collection framework. HashMap java.util.HashMap class is a Hashing based implementation. In HashMap, we have a key and a value… Read More
HashMap and Hashtable store key/value pairs in a hash table. When using a Hashtable or HashMap, we specify an object that is used as a… Read More
Given Inorder and Preorder traversals of a binary tree, print Postorder traversal. Example: Input: Inorder traversal in[] = {4, 2, 5, 1, 3, 6} Preorder… Read More