CS++ Java IDE lets people write, run, and auto-test Java in a browser without installing a JDK. Its custom interpreter supports most of Java and core standard-library features, including classes, generics, collections, lambdas, and streams. A step-through debugger and clear error messages are included for beginners. The runtime does not support threads, writing files, reflection, enums, records, or switch expressions. The browser IDE works on Chromebooks, iPads, phones, Macs, Windows PCs, and other devices with supported browsers, including locked-down school devices. You can start without logging in; signing in is optional and adds cloud saving across devices. Teachers can share starter code and worked examples using links and use the IDE for demonstrations or homework. It is designed for beginners and AP Computer Science A students, with topics that extend beyond the exam. The free plan requires no signup to start. The listing says paid access starts at $9.99 but does not specify a billing term.
Who it is for
The IDE is aimed at beginners and AP Computer Science A students who want to practice Java in a browser. Teachers can use shareable code examples for demonstrations and homework.
What is good
- Runs Java in a browser without a JDK installation.
- Includes a step-through debugger.
- No signup is required to start.
- Optional sign-in adds cloud saving across devices.
- Teachers can share starter code and examples.
What to know first
- The interpreter does not support threads or file writing.
- Reflection, enums, records, and switch expressions are unsupported.
- No free trial is listed.
Verdict
CS++ Java IDE offers browser-based Java practice with debugging, optional cloud saving, and classroom sharing. Check its runtime limits if your work needs unsupported features such as file writing or threads.
CS++ Java IDE plans and pricing
All plansCompared on Java IDEs
- Free plan
- Yes
- Supported operating systems
- Web, Windows, macOS, iOS
