The “Collections” framework in Java came into action with the release of JDK 1.2 and was expanded quite a few times in Java 1.4 and Java 5 and then again in Java 6.
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Choose the Right Java Collection
Java offers you a variety of collection implementations to choose from. In general you will always look for the collection with the best performance for your programming task, which in most cases is ArrayList, HashSet or HashMap. But be aware, if you need some special features like sorting or ordering you may need to go for a special…
Continue readingJava HashSet Example
Collections that use a hash table for storage are usually created by the Java HashSet class. As the name suggests, HashSet implements the Set interface and it also uses a hash table which is a HashMap instance. The order of the elements in HashSet is random. The null element is permitted by this class. In…
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