https://geeksforgeeks.com . https://hackerrank.com . https://hackerearth.com . https://codechef.com . https://codeforces.com . https://learnbyexample.com . https://dmoj.ca . https://codewars.com . These are some websites for practicing coding EDIT: including suggestions from the comments https://www.baeldung.com/java-tutorial More on reddit.com

http://codingbat.com

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The FAQ in the sidebar has some suggestions: Where can I find practice exercises and project ideas? My take on this: There is no way around writing code from scratch if you want to move beyond the beginner stage. It's normal to feel stumped and blocked, and usually people then go and take yet another course, but that keeps them in the same place. Start small, as small as you need: If a text-based Hangman game is too hard for now, do a temperature converter. Then expand on it: Add other conversions to it and let the user pick. Make a GUI for it. Log the conversions made into a file. Process the log, generate statistics. Or write a 6-of-49 lottery number generator. Then add functionality that each set of numbers must be unique if the number of sets allows for it. Add a GUI. You could even turn it into a game later on. Or do a simple to-do list or a note taking app. Basic functionality first (title, body, create, delete, completion toggle), add saving and loading (JSON or another plain text format, add database support later), add editing, add unique ID for each note, add dynamic filtering, add sorting, add exporting, add image support when you have done a GUI for it, and so on. If it's something you have a use for, even better! The hardest part is getting started. It may be helpful to plan a program first on paper or in some piece of software. Use pseudo code or flowcharts. This will give you some structure and force you to think about what you'll do. Then code. It doesn't need to be perfect or look super snazzy, it just needs to work. You can optimize or re-write it later. Problem sites like Edabit are great for warming up, but don't spend all your time solving isolated problems because that will still not teach you to build something from scratch. More on reddit.com

The closest thing that I know of would probably be CodingBat , but even then it just seems to have a couple of topics. Unless anyone knows of something that is like you said, I would just suggest checking out the lists of problems ( Karan , Martyr2's , Project Euler ) or some subreddits ( r/programmingpromts r/dailyprogrammer ) and using them to practice. More on reddit.com