Today in this world of new technologies and software, we do use coding in every simple aspect of technology now a days form just displaying of pages to the highly advanced robotics, we need coding. It is now known to be the mostly needed in the technical field. You can’t expect any coder or a developer without programming knowledge. Though there are many other languages, object-oriented programming languages, have gained much attention in many different fields. There are many object-oriented programming languages such as Java, Python, Ruby, etc.
Object Oriented Programming is nothing but coding based on the real-time environment, i.e., whatever is present around us. To put it simply, a paradigm where everything is referred to as an object is known as an object-oriented programming language. Such a language is Java.
Java is different in many ways different from other programming languages. One of those differences is the usage of methods and functions. Java uses objects to refer the instance of a class. You will be using them in the program once the objects are created. Here the methods come into existence. The procedure in the object-oriented programming which is associated with the class is called a method. To define the behavior of the objects we use methods which are created from the class. To define it in another way, the action that is to be performed by an object is the method. Binding is the association between the class and method.
Let us understand the methods using an example the person which is a class. Here the methods in this class will probably be walking, standing, etc. in the person’s class. Sometimes people get confused with the functions and methods, but they both are different.
To achieve some result or goal, some set of instructions which are combined is called a function. Inputs that are required and taken in a function are called arguments and which gives out results as output.
Let us understand this by an example of driving a car. We need to do the calculations of the amount of fuel used and the distance drove to determine the mileage of the car. Programmatically a function can be written for this calculation. The inputs which are arguments that are required for this function would be consumption of fuel, distance drove and the mileage of the car will be the output that is result. It is not needed to write many no. of functions to calculate the mileage different no. of times. It is enough if we call this function whenever calculation of the mileage is needed.
By this, function almost looks similar to the methods in programming. But they do differ from each other. As we have seen that method is associated with a class, whereas a function is not associated with the class, it is independent. You don’t require an object to use the function; you can use this function anywhere in the code.