Web Reference: Feb 12, 2024 · In Java, every method must declare its return type explicitly, indicating the kind of data it will return (such as int, String, or void for no return value). If the return type is omitted or improperly declared, the compiler flags an error known as the missing return type error. Dec 6, 2023 · In this article, we’ve explored how to address the “Invalid method declaration; return type required” error in Java. This error occurs when a method’s declaration lacks a specified return type, which is crucial for the compiler’s understanding of the method’s output. Mar 29, 2013 · Currently here in your code you have shown just one method showDetails() which has no return type. Certainly there will be other methods also for which you haven't declared a return type.
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