Method overriding in Java allows subclasses to provide specific implementations of parent methods. Using the same signature, a child method replaces the parent's version: annotate with '@Override' to catch errors. For example, if Animal has 'speak()', Dog can override it with its own version. The overriding method is called even when accessed through parent references (polymorphism). Understanding overriding enables specialization and polymorphic behavior in inheritance hierarchies.

Mastering method overriding enables you to create flexible, extensible designs. Being able to specialize behavior in subclasses while maintaining common interfaces is central to polymorphism. In professional development, overriding appears in template methods, strategy patterns, and polymorphic designs. For example, overriding 'toString()' provides custom string representations, while overriding 'equals()' defines custom equality. Always use @Override annotation to catch signature errors.

By learning method overriding effectively, you'll understand polymorphism and create extensible designs. Knowing overriding rules (same signature, covariant return types, access can't be more restrictive) helps you avoid errors. This knowledge is fundamental to OOP. Prerequisites include understanding inheritance, methods, and polymorphism concepts.