This tutorial will walk you through all you need to know about Java methods, including how to use them and what it means for your code as a result. You will be presented with several examples of Java methods that are used to carry out a variety of activities. You will also become familiar with common applications, as well as films that will assist drive the concepts home.
What does the term “Method” mean in Java?
Java methods are sections of code that only need to be written once but can be invoked in several places. Because it reduces the total amount of code that a developer needs to create, this method is consistently regarded as the best way to write code. When you build code in a way that allows it to be reused, the resulting program can be built into a more flexible piece that requires less code to accomplish its goals.
It is possible to make your code simpler to read and comprehend by breaking it up into smaller chunks using Java’s built-in methods and other features. Your software will become more scalable as a result of this approach, which will make it much simpler to develop it into a more comprehensive and powerful application as it expands.
Let’s have a look at some examples now that you are familiar with the fundamentals of Java methods, including their theory, their purpose, and the method syntax.
Creating Methods in Java and How to Do It
Writing methods in Java is a simple process, and using them with other methods, particularly when first understanding how they function, can be a lot of fun.
Let’s take a closer look at this syntax to determine the purpose of each individual component of the method declaration.
Modifier: It determines the access kinds, such as whether the method is public, private, or something else entirely.
If you use the static keyword, you will be able to access it without first having to create any objects.
ReturnType is used to determine the type of data that will be sent back to the calling method name OfMethod is a variable that is used to identify the method name that will be used to call it later.
You have greater control and flexibility over the construction of your methods when you employ the complete syntax; in fact, by adding parameters, you can even take input from the user. Using this, you would be able to design an app that functions as a calculator and that you could scale by continually adding new features to it.
Let’s take a look at a video that demonstrates how to design a method that can be utilized in the process of developing such an app as a calculator.
Java Methods Examples
Let’s get started by looking at how to construct a straightforward method of adding integers and then learning how to put it to use. You may see a simple strategy for putting some numbers together below, which will serve as our starting point for this exercise.
int addNums() and
This function, which returns an integer and can be called using its name, addNums(), can be invoked at any time in your file. It can also be called using its name. However, because the static keyword was added, the method will need to be created by first constructing an object instance of itself before it can be used. In addition, up to this point, this method has not carried out any actions; in order for it to do so, it has to be provided with a statement.
Let’s develop a static method that just adds the numbers together using the way that was just described.
a function called static int addNums()
int x = 5;
int y = x + x;
sum integral = y plus x;
Once you have this method set up, you will be able to retrieve the total of your math problem by calling this method at a later point in your project. This approach can be modified to accept user-supplied numbers, so enabling the creation of an easy addition calculator that supports a number of alternative approaches.
Getting Started With Java Methods and How to Use Them
You won’t have any trouble moving forward with Java methods if you utilize the code in this post to begin working on a small project. From there, you may expand it into a much larger and more robust piece of software. After that, you have the option of adding new methods that provide support for operations such as subtraction, multiplication, and division.
A deeper grasp of methods and modular programming approaches can be attained by first learning how to construct and then using these ways in conjunction with one another.
Comparison of Polymorphism and Inheritance
The ability to reuse code is made easier through inheritance, which enables you to create distinct instances of a parent class without having to rewrite any of the code. Because the idea of polymorphism is so close to inheritance, it is simple to have the two confused with one another. Nevertheless, they are not the same thing.
The key difference is that polymorphism makes it possible to make individualized changes. With polymorphism, you can allow child classes make minor modifications to the inherited methods, and then, based on the input parameters, polymorphism will determine which version of the method to compile. For further information, take a look at our article that discusses polymorphism in Java.
Utilizing Inheritance in Java within Your Code
You may improve the reusability of your code and model the actual world with the help of an excellent tool called inheritance, and Java provides you with the proper tools to integrate inheritance into your toolbox in a seamless manner. Because of the versatility offered by its five categories, it is able to very effectively depict qualities that are seen in the real world.
In addition, you can create different inheritance strategies by making use of the super keyword in conjunction with interfaces. Because of this, inheritance is better able to simulate the processes that occur in the real world, which makes it a very valuable concept for the creation of virtual reality software and video games.