Apr 7, 2010 · Hashmap is used for storing data in key value pairs. We can use a hashmap for storing objects in a application and use it further in the same application for storing, updating, deleting values.

What are the differences between a HashMap and a Hashtable in Java? Which is more efficient for non-threaded applications?

64 Map is an interface that HashMap implements. The difference is that in the second implementation your reference to the HashMap will only allow the use of functions defined in the Map interface, while …

A hash_map is an older, unstandardized version of what for standardization purposes is called an unordered_map (originally in TR1, and included in the standard since C++11). As the name implies, …

Jul 1, 2009 · Since all maps in Java implement the Map interface, the following techniques will work for any map implementation (HashMap, TreeMap, LinkedHashMap, Hashtable, etc.) Method #1: …

Apart from the fact that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet in their implementation? It's a little bit vague because both use hash tables to...

On an average, the time complexity of a HashMap insertion, deletion, and the search takes O (1) constant time in java, which depends on the loadfactor (number of entries present in the hash table …

For a hash table resolving collisions with chaining (like Java's hashmap) this is technically O (1+α) with a good hash function, where α is the table's load factor. Still constant as long as the number of objects …

HashMap<String, HashMap> selects = new HashMap<String, HashMap>(); For each Hash<String, HashMap> I need to create a ComboBox, whose items are the value (which happens to be a …

Mar 26, 2013 · 20 I am new to java and practicing by creating a simplistic NaiveBayes classifier. I am still new to object instantiation, and wonder what to do to initialize a HashMap of HashMaps. When …