CS++ Java IDE vs Jvdroid

CS++ Java IDE lets users write and run Java in a browser without installing a JDK. Its custom interpreter handles 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, and Windows PCs, including locked-down school devices. Users can begin without an account; signing in is optional and adds cloud saving across devices. Teachers can share starter code and worked examples by link, and use the IDE for demonstrations and homework. It is aimed at beginners and AP Computer Science A students, with supported topics extending beyond the exam to generics, collections, lambdas, and streams. The free plan supports writing, running, and auto-testing Java in a browser without signup to start. The listed pricing note says paid access starts at $9.99, though no paid plan details are provided here.

Jvdroid is an educational Java IDE for Android with an offline compiler, so Java programs can run without an internet connection. It includes standalone OpenJDK 11 and supports Maven projects and libraries. Maven can build Kotlin, Scala, and Clojure programs, although Jvdroid does not provide code prediction or analysis for those languages. The editor offers a Javadoc viewer, code formatting, syntax highlighting, themes, tabs, and one-click sharing to Pastebin. Code prediction, automatic indentation, and real-time code analysis are marked as Premium features. The Free plan costs nothing and contains ads and in-app purchases; a Premium plan is listed without a price. At least 250 MB of free internal memory is required, with 300 MB or more recommended. Jvdroid does not build native Android applications. Google Play says the app may collect location and personal information, share location and financial information with third parties, encrypt data in transit, and not allow data deletion. BusyBox and OpenJDK in the APK are GPL-licensed.