There is also a visual indicator in the Project tab of Android Studio - a class inside a class, like you have nested classed, but with an error indicator. The solution is to simply rename class name in the Project tab (SHIFT + F6) to match the name in the Java code.

If there is a public class in a file, the name of the file must match the name of the public class. For example, a class declared as public class Dog { } must be in a source code file named Dog.java. You should split up your file into 5 files so that you only have one class per file.

Jan 1, 2025 · Learn about the compile error "class X is public should be declared in a file named X.java", why it happens, and how to resolve it.

Feb 11, 2025 · This error occurs because Java enforces strict filenames and public class name matching. The two possible fixes are: Renaming the file to match the public class name. Removing the public modifier from the class. By following these rules, you can avoid this compile-time error and write Java programs that compile successfully.

Feb 12, 2024 · This tutorial highlights the reasons and solutions to fix the error which states class A is public should be declared in a file named A.java.

You need to remove the class declarator from the declaration of the class constructor. Your class declaration public class Book(String bookName) isn't allowed in java. You need to change it to public class Book. Try this: private String name; private int price; public Book(String bookName) { name = bookName;

Feb 11, 2022 · Here are the 10 most commonly encountered Java compile time errors: Example of an 'unreachable code' error, one of several common Java compile errors. 1. Class and source file mismatch. The name of the Java source file, as it resides on the filesystem, must exactly match the name of the public Java class as it is defined in the class declaration.

Jun 26, 2017 · We’ve rounded up 50 of the most common Java software errors, complete with code examples and tutorials to help you work around common coding problems.

Mar 21, 2019 · In this post, you will find the errors we found to be most troubling to students in Java and some tips on how to approach them. To start off, here is a quick refresher on how to read an error in the Java stack trace. public static void main (String[] args) { System.out.println("Hello") This error means that you forgot a semicolon in your code.

Jan 28, 2021 · There can be one of the following reasons we get “class, interface, or enum expected” error in Java: Case 1: Extra curly Bracket. } // extra bracket. In this case, the error can be removed by simply removing the extra bracket. Case 2: Function outside the class.