Writing a Method (Function)

This lesson covers writing a method (function) in Java, so you can write code that's reused across many calls. It's for anyone searching "Java method tutorial."

In Java, a function is called a method. Define one in the form return-type methodName(parameters). Bundling logic you use often under a name means you can just call it whenever you need it.

The example defines a method, greet, that takes a name parameter and returns a greeting message as a String. Like a recipe you write once, naming a set of steps lets you reproduce the same result any time you need it.

A common early mistake is not following method naming conventions. Method names should typically start with a verb — like getName() — so the name itself conveys "what this does"; skipping this convention leads to confusing names.

In real projects, bundling shared logic into a method reduces duplication and means a fix only needs to happen in one place.