Transcript - How a Java HashMap internal implementation works One of the most common Java interview questions, and it is an advanced Java interview question, is: How does a Java HashMap work?They're ...

This method returns the value to which the specified key is mapped, otherwise returns the given defaultValue if this map contains no mapping for the key. when we needed to get the value for specific ...

Furthermore, the Java API provides a special class called the ConcurrentHashMap which offers synchronization facilities over and above both that of the HashMap and Hashtable. The special class ...

In the example below I'm using a simple hashmap to "simulate" a backend database, so it can keep track of my records, this is obviously not a real world scenario but it serves the purpose of that ...