public double calculateAnswer(double wingSpan, int numberOfEngines, double length, double grossTons) A method is a set of code which is referred to by name and can be called (invoked) at any point in a program simply by utilizing the method's name. Java calls these subroutines methods, and we're going to look at how to write basic Java methods that we can use with our programs that we create inside of the main method. In the following example, Sayable is a functional interface that contains a default and an abstract method. First, let us discuss how to declare a class, variables and methods then we will discuss access modifiers. Call a Method in Java. In this tutorial, we will study What are Methods in Java, What are the types of Methods in Java, What are the components of a method like - 1. Declaration of Class: Think of a method as a subprogram that acts on data and often returns a value. The “main” method in Java is required if you want to make a runnable Java application. A method can support arguments and usually returns a value. The Java compiler will let us add another method like the above example because its method signature is different, setMapReference(Point) in this case. Java variables are two types either primitive types or reference types. Name of the Method 4. Methods which are defined inside the interface and tagged with default are known as default methods. More on that in a bit. Java Default Method Example. Body of the Method The syntax to declare a method is: returnType methodName() { // method body } Here, returnType - It specifies what type of value a method returns For example if a method has an int return type then it returns an integer value. The method declares a string FIRST_NAME and prints the value on the screen without any parameters being passed to the method. Along with fields, methods are one of the two elements that are considered members of a class. Arguments 5. Do you remember our very first program when we created: This is not a Java method, but this is a call to a method. Declaring a Java Method. It’s not required to explicitly use the “main” method when doing Java programming, as you can also create runnable “test” methods (via the @Test) annotation… but under the hood, those methods will invoke a “main” method as well. A Static method is declared with the static keyword.Making a static method in java required when you don’t want a create an object or method is not using any instance variable or method definition will not change or can’t be overridden.This is some reason when to use static methods in java. A method is a unit of code that you call in a Java program. Access Specifier 2. According to wikipedia, a definition for the encapsulation is; A language mechanism for restricting direct access to some of the object’s components. Java is object-oriented programming language. The Java Main Method. Java is considered as an object-oriented, class-based, general-purpose and concurrent programming language which was created in 1995 by the Green Team comprising James Gosling, Mike Sheridan and Patrick Naughton at Sun Microsystems for various devices with a digital interface like set-top boxes, televisions, etc. To create a method in Java, follow these four steps. A method in Java is a block of statements that has a name and can be executed by calling (also called invoking) it from some other place in your program. Java Main Method. (Constructors … This lesson is about getter and setter methods in java which is a technique used as a part of programming language mechanism, encapsulation.First of all, let me tell you what is encapsulation.. Java provides a facility to create default methods inside the interface. Java classes consist of variables and methods (also known as instance members). Image Credit - Pixabay. Return Data Type 3. These methods are non-abstract methods. 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