Methods calling other methods in Java enables code reuse and decomposition. Within a class, methods can call each other: one method can invoke another to delegate work. For example, a 'processOrder()' method might call 'validateOrder()', 'calculateTotal()', and 'saveOrder()' methods. This decomposition breaks complex operations into manageable steps. Methods can call other methods in the same class (internal delegation) or on other objects (external delegation). Understanding method orchestration is key to designing clean, maintainable systems.

Mastering method composition enables you to build complex operations from simple building blocks. Being able to decompose problems into method chains is essential for maintainability and testing. In professional development, method orchestration appears in workflows, pipelines, and complex business logic. For example, an authentication method might call validation, credential checking, and session creation methods in sequence. This approach enables testing each step independently and keeps methods focused.

By learning method orchestration, you'll design systems with clear separation of concerns and single responsibility. Understanding when to create new methods versus extending existing ones is crucial for maintainability. This skill is fundamental to professional software design. Prerequisites include solid understanding of methods, objects, and design principles in Java.