In Java, which type of identifier is expected to start with a capital letter?

In Java, class names are expected to start with a capital letter as a convention known as PascalCase or UpperCamelCase. This convention enhances code readability and distinguishes classes from variables and methods, which typically start with a lowercase letter. Using a capital letter for class names signals to other developers that the identifier represents a blueprint for objects, encapsulating both data and behavior.

For instance, if you have a class that represents a car, you would name it Car rather than car. This naming convention helps maintain a clear structure in the codebase, making it easier to identify class definitions at a glance.

While variable names, method names, and package names follow different conventions—lowercase starting letters for variables and methods, and generally all lowercase for package names—class names specifically command the use of a capital letter to indicate their distinct role within the framework of Java programming.