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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java collections tutorial
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…
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