in-depth, to-the-point tutorials on java, spring, spring boot, security, and rest.

a computer science portal for geeks. it contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview questions.

well organized and easy to understand web building tutorials with lots of examples of how to use html, css, javascript, sql, python, php, bootstrap, java, xml and more.

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free but high-quality portal to learn about languages like python, javascript, c++, git, and more. delf stack is a learning website of different programming languages.

tutorials point is an online learning platform providing free tutorials, paid premium courses, and ebooks. learn the latest technologies and programming languages sql, mysql, python, c, c++, java, python, php, machine learning, data science, ai, prompt engineering and more.

jetbrains is a cutting-edge software vendor specializing in the creation of intelligent development tools, including intellij idea – the leading java ide, and the kotlin programming language.

tutorials, free online tutorials, javatpoint provides tutorials and interview questions of all technology like java tutorial, android, java frameworks, javascript, ajax, core java, sql, python, php, c language etc. for beginners and professionals.

stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

oracle offers a comprehensive and fully integrated stack of cloud applications and cloud platform services.