what is a method in java

Java Main Method. The Java Main Method. 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. Java provides a facility to create default methods inside the interface. In the following example, Sayable is a functional interface that contains a default and an abstract method. The Java compiler will let us add another method like the above example because its method signature is different, setMapReference(Point) in this case. The “main” method in Java is required if you want to make a runnable Java application. 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. If the method does not return a value, its return type is void. Do you remember our very first program when we created: This is not a Java method, but this is a call to a method. More on that in a bit. A method can support arguments and usually returns a value. The method declares a string FIRST_NAME and prints the value on the screen without any parameters being passed to the method. Declaration of Class: 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.. First, let us discuss how to declare a class, variables and methods then we will discuss access modifiers. Java is object-oriented programming language. Java variables are two types either primitive types or reference types. Body of the Method public double calculateAnswer(double wingSpan, int numberOfEngines, double length, double grossTons) Java Default Method Example. 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. Arguments 5. Call a Method in Java. Image Credit - Pixabay. 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. Declaring a Java Method. Java classes consist of variables and methods (also known as instance members). Name of the Method 4. Methods which are defined inside the interface and tagged with default are known as default methods. (Constructors … 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. A method is a unit of code that you call in a Java program. According to wikipedia, a definition for the encapsulation is; A language mechanism for restricting direct access to some of the object’s components. Think of a method as a subprogram that acts on data and often returns a value. These methods are non-abstract methods. Access Specifier 2. Return Data Type 3. To create a method in Java, follow these four steps. 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. 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