Different types of Methods in Java Programming Language?
In general, a technique is a method of performing an action. Similar to the way is a method in Java is a set of instructions which performs the specific task. It allows for reuse of the code. You can also modify code by using methods. In this article we will discover the definition of a method in Java as well as the various kinds of methods, methods declaration and the best way to invoke a method in Java.
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What is a technique in Java?
The term “method” refers to a piece of code, a collection of statements or code that is group together to complete an operation or task. It’s used to increase the reuse of the code. We create a method once and reuse it many times. It is not necessary to write code over and over again. It also allows for the simple modification and comprehension of code by removing or adding an element of code. This method will only be executed when we call it.
The most significant method used in Java is the principal() method. If you’d like to know more about the primary() procedure, you can go to the following link.
Method Declaration
The declaration of method contains details about the attributes of the method, like visibility, return-type names, name, and arguments. It contains six elements that are refer to as the method headers as shown in the next figure.
Method Signature: All methods comes with an associated method signature. It’s element of the declaration of the method. It includes the name of the method and the parameter list.
Access Specification: The Access Specifier or modifier refers to the type of access used by the method. It determines the accessibility of the method. Java offers four kinds of access specifiers:
- Public Method: This method is available to all classes when we implement public specifiers inside our program.
- Private: When we make use of an access specifier that is private it is available only to the classes in the class in which it is specified.
- Protected: If we use a protected access this method, it is available in the exact same program, or subclasses of an entirely different package.
- Standard: If you do not specify any access specifiers in the declaration of a method, Java uses default access specifiers by default. It is accessible only from the same package.
Return Type: The Return type is a type of data in which the function returns. It can be an initial data type like collection, object or void. If the method doesn’t produce anything, we will use the an empty keyword.
Method Name: It’s an unique name use to describe the method’s name. It must correspond to the function for the procedure. For instance, if we’re formulating a method for subtraction of 2 numbers. The method’s name should be the word subtraction(). The method is invoke through its name.
Parameter List: It’s an array of parameter names that is separated by a comma. It is enclose by a couple of parentheses. It includes the data type and the name of the variable. If the method does not have a parameter, you can leave the parentheses unmarked.
Method Body: It’s an integral element of the declaration of the method. It contains the entire sequence of actions to be complete. It is house in a pair of braces curly.
Naming a Method
When defining a method, be aware that the name of the method is a verb, and begin with a lowercase letter. If the method name contains at least two terms, then the first word must contain a verb that is followed by an adjective or a noun. For a multi-word method name each letter in the beginning of every word has to be capitalized with the exception of the first word. For instance:
It’s also possible one method may have similar names as a different method within the same class, it’s known by the term method overloading.
Types of Method
There are two kinds of methods available in Java:
- Predefined Method
- User-defined Method
Predefined Method
In Java the predefined method is the method that has been specified within Java class libraries. Java class libraries. It is refer to by the name of predefine techniques. Also, it is known as “standard library methods” or the built-in method. You can use these methods by simply calling them within your program from any time. The predefined methods include length() equals() and compareTo() sqrt() etc. When we invoke any of these methods within our application, we will see a sequence of code that are related to the method is execute in the background. These codes are already within the library.
Each method that is predefine is describe inside an class. For instance, the printing() method . It is specify within the java.io.PrintStream class. It prints the message write inside the method. For instance, print(“Java”) is what it prints. produces Java in the console.
User-defined Method
The method create by the programmer or user is known the user define method. The methods are modify according to need.
Static Method
A method that includes the static keywords is refer to as a static method. That is the method that is attach to a class, rather than being an individual instance can be describe as static method. It is also possible to create static methods by adding the word static in the name of the method.
The major benefit of the static method is that we can use it without the need to create an object. It is able to connect to static members of data, and modify the value. It is use to create instances of methods. And It is invoke using its class’s name. The most effective example of static methods is the primary() method.
Instance Method
The method in the class is refer to as the instance method. This is not a static technique that is describe by the class. Before calling or calling the method of instance it is require to create an object in its class. Let’s look at an example of the instance method.