Many data structures have been developed so programmers can store and retrieve values efficiently. The Java API provides implementations of common data structures and algorithms, as well as a ...

HashSet is a collection that does not allow duplicate elements. It uses a hash table to store elements, so the retrieval time is generally constant (O(1)) for most operations. It does not maintain any ...

Java 8 was a major release with many new features such as Lambdas, Functional interfaces, Streams, Date Time API etc. This is a must have if you are going to any java interview because it’s always ...