What scopes can be used in any application?

• Local Scope: Variables declared inside a method, constructor, or block ({}). They are only accessible within that block.
• Instance Scope: Class member variables (non-static). Belong to a specific object of the class and are accessible through its methods.
• Class/Static Scope: Class member variables declared with the static keyword. They belong to the class itself rather than a specific object and are accessible directly by the class name.
• Package Scope: Class members (variables, methods, constructors) without an explicit access modifier (public, protected, private). They are accessible to all classes in the same package.

These scopes are fundamental in Java SE and apply to all types of Java applications (console, Web, Desktop, etc.).

In the context of web applications (e.g., using Spring, Jakarta EE/Java EE), additional scopes are also used:

• Request Scope: Objects associated with a single HTTP request.
• Session Scope: Objects associated with a user session.
• Application Scope: Objects available throughout the web application.