In Java programming, a method is a set of instructions grouped together that executes only when called or invoked. It helps organize and structure code by dividing it into smaller, manageable parts. Methods in Java can accept input data called parameters, which allow you to pass information to the method for processing. These parameters enable methods to perform specific actions or calculations based on the provided data.
Methods in Java are also commonly referred to as functions. They serve a crucial purpose in Java programming by encapsulating reusable blocks of code. Instead of writing the same code repeatedly, you can define a method once and call it multiple times from different parts of your program. This promotes code reusability, making your code more efficient, maintainable, and easier to understand.
The ability to define and use methods greatly enhances the flexibility and organization of your code, allowing you to break down complex tasks into smaller, more manageable chunks. By utilizing methods effectively, you can write cleaner code and save time and effort by reusing existing code logic.
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Create Methods in Java
In Java programming, methods are blocks of code declared within a class. They have a specific name and are enclosed in parentheses (). While Java provides built-in methods like System.out.println() for common tasks, you can also create your own methods to perform customized actions.
By defining your own methods, you can write code that solves specific problems or performs desired actions. This lets you encapsulate functionality and make your code more modular and organized. Instead of repeating the same code in multiple places, you can define a method once and call it whenever needed.
For example, suppose you frequently need to calculate the average of a set of numbers. In that case, you can create a method called calculateAverage() that takes the numbers as parameters and returns the average. This way, you can call the calculateAverage() method whenever you need to compute the average without having to rewrite the entire calculation logic each time.
public class Main {
  static void myMethod() {
    // code to be executed
  }
Let’s break down the example and understand its components:
Method Name: The method is named myMethod(). It serves as a unique identifier for the method and can be used to call or invoke it.
Static Keyword: The static keyword indicates that the method belongs to the Main class itself and not to an object of the Main class. This concept will be explored further in this tutorial when you learn about objects and how to access methods through objects.
Void Keyword: The void keyword specifies that this method does not return any value after its execution. In other words, it performs a specific task or action without providing any result or output. You will encounter return values and their significance in later chapters.
Understanding these components helps us grasp the structure and behavior of the method in the example. The method’s name provides a unique identifier; the static keyword determines its association with the class, and the void keyword signifies its lack of a return value. By comprehending these aspects, we can effectively work with methods in Java and utilize them to perform various tasks within our programs.
How to Call a Methods in Java
public class Main {
In Java, calling a method involves writing the method’s name followed by a pair of parentheses () and a semicolon (;). Let’s take an example to understand this better. Suppose we have a method called myMethod(). When we call or invoke this method, it performs a specific action, such as printing text on the screen.
To call the myMethod() in our program, we write its name, followed by parentheses, like this: myMethod(); By making this method call, we trigger the execution of the code inside the myMethod() and observe the desired action taking place, which in this case is printing a text.
Calling methods in Java is a fundamental concept that allows us to execute specific blocks of code whenever needed. It enables code reusability, as we can call the same method multiple times throughout our program, avoiding duplication and making our code more concise and efficient.
  static void myMethod() {
    System.out.println(“I just got executed!”);
  }
  public static void main(String[] args) {
    myMethod();
    myMethod();
    myMethod();
  }
}
Output:
I just got executed!
I just got executed!
I just got executed!
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Frequently Asked Questions
Q1. What are the methods in Java?Â
Ans. A Java method is a sequence of code that, when invoked, performs special actions specified in it. For instance, it will do that job when you have written instructions on drawing a circle in the method. You can insert values or parameters into the methods, and they won’t run until called.
Q2. What are the different types of methods in Java?
Ans. There exist two types of methods in Java such as:
- Pre – Defined Methods/ Standard Library Methods/System defined Methods
- User-defined Methods
Q3. What are the Java methods’ parts?Â
Ans. The only required elements of a method declaration are the method’s return type, name, a pair of parentheses, (), and a body between braces, {}.
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