How to create Java Custom Annotation. A simple example of creating Annotations in Java and usage by calling the Reflection API.

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How to execute a shell command from Java using Runtime.getRuntime().exec() method.

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How to generate UUID / GUID in Java using java.util.UUID class, UUID.randomUUID() method.

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How to change Tomcat default port 8080 to any other port. Three steps: locate server.xml file, edit and restart the Tomcat service.

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Maven local repository default location for Linux and Windows and how to change the location.

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How to read XML file in Java using SAX Parser.

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