How to generate random numbers in a range using Java. A simple method using SecureRandom, class.

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How to create a Java project with Maven. Simple steps to generate the project, import in Eclipse and run the application.

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How to loop a Map in Java. 6 different methods to loop through a map. The main difference is the looping method.

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How to sort TreeMap in descending order in Java. A simple example using a string as keys.

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Thread Semaphore and Mutex in Java. Semaphore restrict the access to a resource for limited numbers of threads while mutex restricts the access to a single thread.

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Enum examples in Java. Simple enum usage. How to convert String to Enum object. Enum object with fields and methods.

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