While exploring the Programiz Java compiler, I came across a behavior that could impact learners understanding core Java concepts. The platform does not recognize the main method when the class containing it is not placed at the top of the file. This creates confusion, as the program fails to execute even though the code is syntactically correct. In standard Java execution, the entry point is identified solely by the method signature: public static void main(String[] args) —not by the position of the class in the file. This inconsistency may mislead beginners and create a gap between learning environments and real-world Java behavior in IDEs or JVM-based execution. Implementing proper compilation handling aligned with standard Java specifications, along with regression testing for different class structures, can help ensure accurate behavior. Combining automated checks with exploratory testing would help catch such inconsistencies early. Programiz — hope this feedback helps in improving the learning experience further. #Java #Programiz #BugReport #QA #SoftwareTesting #Developers #Learning #Coding #JavaDeveloper #TestAutomation #QualityEngineering

Hi Md Shahbaz Anwar, Thanks for reporting this and for taking the time to share it! We really appreciate the feedback! After looking into this, we wanted to clarify that this is actually intended behavior in our online Java compiler. Here's how it determines which class to run: 1. It first looks for a class named `Main` — if found, that becomes the entry point. 2. If no `Main` class exists, it defaults to the **first class defined** in the file. The reason for this approach: since the compiler works with a single file, scanning through all classes to find the one with the `public static void main` method would add noticeable performance overhead, especially when multiple classes have a `main` method, which would make it ambiguous anyway. To keep things fast and predictable, the simplest fix is to either: - Name your main class `Main`, or -Place your main class first in the file. Hope that clears things up! Let us know if you have any other questions.

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