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I've taken a few classes in high school that used java (including AP Computer Science A/AB) and have a grasps on the basics of the language. However, I know nothing on making an actual application, since most of the projects we made in class were simple little things; their main purpose was to demonstrate a few concepts. They ran off the command line, and didn't do much more than output a list of numbers or run a calculation. I want to use java to start making programs that serve a purpose and are actually useful. How should I start? Is there a place where I can get some experience with this?

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- with AP CS under your belt you can move from classroom exercises to real apps by picking one small, useful problem and finishing it end-to-end. Examples: a command-line file renamer, a tiny personal expense tracker that persists to a file or embedded DB, or a simple REST to-do service. Start as a working CLI, add persistence and automated tests, then layer a GUI or web front end. Ship a minimal viable product (MVP) and iterate — finishing small projects teaches a lot.

Adopt practical tools early: Git for version control (read the Pro Git book), host code on GitHub, and use a build tool like Maven or Gradle. Write tests with JUnit 5, add CI (for example GitHub Actions), and include a clear README, LICENSE, and CONTRIBUTING.md so your work is visible and reusable.

As and suggested, real open-source work accelerates learning. Find beginner-friendly Java issues on Good First Issues and Up For Grabs. Use the First Contributions tutorial to learn the fork-and-PR flow. Begin with docs, tests, or small bug fixes; always read a project’s CONTRIBUTING file and license before submitting code.

When you expand, pick one stack and learn it well: Spring Boot for web services, OpenJFX for desktop GUIs, and consult OpenJDK for core Java guidance. Keep scope small, commit often, write tests, and publish your projects — a few polished repos plus open-source contributions show practical skills better than many classroom programs.

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Member Avatar for mohamedsafiq

you can find lot of open source projects on net download and work it out then you can able to do the projects with your own.

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