In Java, a method is a block of code that performs a specific task and returns a result to the caller. Methods are used to perform certain actions and are also known as functions. They allow code reusability, which means that you can define the code once and use it many times.
To create a method in Java, you must declare it within a class. It is defined with the name of the method, followed by parentheses (). Java provides some pre-defined methods, such as System.out.println(), but you can also create your own methods to perform certain actions.
The syntax of a method declaration includes the access modifier, return type, method name, and list of parameters. The method declaration provides information about method attributes, such as visibility, return-type, name, and arguments.
Methods can be called by using their name followed by parentheses and a semicolon. There are two types of methods in Java: user-defined methods and standard library methods.
Some advantages of using methods in Java include code reusability, code optimization, and improved performance. By organizing your code into well-structured methods, you can improve performance by reducing the amount of code that needs to be executed and by making it easier to cache and optimize your code.
