Java Tutorials
Java Anonymous (Inner) Class: Explained With Types, Examples
Table of Contents
- Introduction
- What is Anonymous Class in Java?
- Syntax
- Example of Anonymous Class in Java
- Types of Anonymous Inner Class in Java
- Advantages of Anonymous Classes in Java
- Difference Between Regular Class and Anonymous Inner Class in Java
Java Anonymous Class FAQs
Anonymous classes are useful for creating one-time use class instances, especially when implementing interfaces or extending classes for specific tasks. They are convenient when you need a quick and temporary implementation without explicitly defining a separate class.
Yes, an anonymous class can extend a class and implement an interface simultaneously. It can have only one superclass, but it can implement multiple interfaces.
Anonymous classes can have constructors, but you cannot invoke them directly. Instead, you must use the constructor of the superclass.
Yes, anonymous classes can have instance variables. However, they are typically not used for such purposes due to their short-lived nature.
No, anonymous classes cannot be declared as static. They are always implicitly non-static (inner) classes.
Anonymous classes can access local variables of the enclosing method if those variables are effectively final (meaning their values do not change after they are assigned).
Anonymous classes are thread-safe if the methods and variables they access are themselves thread-safe. Just like with regular classes, you need to ensure proper synchronization if necessary.
Yes, with Java 8 and later, you can use lambda expressions for functional interfaces (interfaces with a single abstract method), which provide a more concise syntax for achieving similar functionality.
