Defining and Calling Methods
Explore how to create and invoke methods in Java to structure code into reusable, focused units. Understand defining methods with parameters and return types, method invocation flow, and building modular applications that improve readability and maintainability.
We'll cover the following...
So far, all code has been written inside a single main method. Although this approach works for small programs, it becomes difficult to maintain as the codebase grows. In a production application, operations such as tax calculation, email dispatch, and user validation should not be implemented in a single monolithic block. This structure reduces readability and significantly increases maintenance overhead.
Java solves this with methods. Methods are the “verbs” of our code. They allow us to define an action once and perform it as many times as we need. By breaking our code into smaller, focused methods, we turn a chaotic list of instructions into a clean, readable story.
The anatomy of a method
A method is a named block of code that performs a specific task. Defining a method involves specifying its access level, return type, name, and any inputs it requires.
For now, we will define our methods as public static. We will explore access modifiers like public and private in depth later, but we need static here so our methods can be called directly from the main method.
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