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Collections Framework

Find duplicate elements in ArrayList – This example will show, how to find no of duplicate item occurrence from a ArrayList. 1) No of item occurrence for a single item 2) No of occurrence of […]

Java Handling large amounts of data Large Data When it comes to handle large data, then it may be either from DB or files. Suppose in your application you needs to use data in a […]

Concurrent Collections in java: The java.util.concurrent package includes some classes and interfaces related to the Java Collections Framework. Below are the concurrent collection interfaces – BlockingQueue defines a first-in-first-out data structure that blocks or times […]

How HashMap works in JAVA

How HashMap works in JAVA HashMap permits null values and the null key. The HashMap class is equivalent to Hashtable, except that it is unsynchronized and permits nulls. This class makes no guarantees as to […]

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