Naming a Method

A method name is typically a single word that should be a verb in lowercase or a multi-word, that begins with a verb in lowercase followed by an adjective, noun. After the first word, the first letter of each word should be capitalized. 

Rules to Name a Method:

• While defining a method, remember that the method name must be a verb and start with a lowercase letter.
• If the method name has more than two words, the first name must be a verb followed by an adjective or noun.
• In the multi-word method name, the first letter of each word must be in uppercase except the first word. For example, findSum, computeMax, setX, and getX.

Generally, a method has a unique name within the class in which it is defined but sometimes a method might have the same name as other method names within the same class as method overloading is allowed in Java.

The method in Java or Methods of Java is a collection of statements that perform some specific tasks and return the result to the caller. A Java method can perform some specific tasks without returning anything. Java Methods allows us to reuse the code without retyping the code. In Java, every method must be part of some class that is different from languages like C, C++, and Python. 

• A method is like a function i.e. used to expose the behavior of an object.
• It is a set of codes that perform a particular task.

Syntax of Method

<access_modifier> <return_type> <method_name>( list_of_parameters)
{
    //body
}

Advantage of Method

• Code Reusability
• Code Optimization 

Note: Methods are time savers and help us to reuse the code without retyping the code. 

Method Declaration

In general, method declarations have 6 components:

1. Modifier: It defines the access type of the method i.e. from where it can be accessed in your application. In Java, there 4 types of access specifiers. 

• public: It is accessible in all classes in your application.
• protected: It is accessible within the class in which it is defined and in its subclasses.
• private: It is accessible only within the class in which it is defined.
• default: It is declared/defined without using any modifier. It is accessible within the same class and package within which its class is defined.

Note: It is Optional in syntax.

2. The return type: The data type of the value returned by the method or void if does not return a value. It is Mandatory in syntax.

3. Method Name: the rules for field names apply to method names as well, but the convention is a little different. It is Mandatory in syntax.

4. Parameter list: Comma-separated list of the input parameters is defined, preceded by their data type, within the enclosed parenthesis. If there are no parameters, you must use empty parentheses ().  It is Optional in syntax.

5. Exception list: The exceptions you expect by the method can throw; you can specify these exception(s). It is Optional in syntax.

6. Method body: it is enclosed between braces. The code you need to be executed to perform your intended operations.  It is Optional in syntax.