Java 9 REPL

How can you start using one of the coolest features of Java 9 starting today?

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How to use a Java HashSet by example

What is a HashSet A HashSet is an unordered collection containing unique elements. It has the standard collection operations Add, Remove, Contains, but since it uses a hash-based implementation, these operations are O(1) Learn with a Programming Question ... (more…)

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Java IdentityHashMap Class

Java.util package provides an IdentityHashMap class which implements the Map interface with a hash table, using reference-equality in place of object-equality when comparing keys (and values). In other words, in an IdentityHashMap, two keys k1 and k2 are ... (more…)

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