Java Method With Examples : The Ultimate Guide For Beginners 2021

Good day, IT SOURECODERS! for this tutorial we will discuss about the Java Methods and its function, it also includes a Java Method Example to be executed and its expected output.

What is Java Method?

Java Method – In Java, a method is a collection of statements with a name that may be called (also known as invoking) from anywhere in your application. Methods are one of the two elements that are considered members of a class, together with fields. (Class members do not include constructors and initializers.)

For a program to accomplish any task, it must contain at least one method. Every program must also have a main method, which is the method that is called first when the program is run.

Create a Method In Java

Within a class, a method must be declared. It is defined by the method’s name, which is preceded by parenthesis (). There are certain pre-defined methods in Java, such as System.out.println(), but you can also write your own to handle specific tasks.

Example Code:

Created a method inside main:

Example Explained:

  • myMethod() – is the name of the method
  • static – means that the method belongs to the Main class and not an object of the Main class. You will learn more about objects and how to access methods through objects later in this tutorial.
  • void – means that this method does not have a return value. You will learn more about return values later in this chapter

Java Method Call

In Java, write the method’s name followed by two parentheses () and a semicolon ; to invoke the method.

When myMethod() is used, it prints a text (the action) in the following example.

Example Code:

Inside main, call the myMethod method:

*You can paste your code and execute to see the output here!

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Expected Output:

Java Method Array

Arrays can be supplied to a method as an argument and also returned from a method in Java. As a reference, arrays are supplied to the method. The array name that points to the array’s initial address is given when invoking a certain method.

Instead of defining distinct variables for each item, arrays are used to hold numerous values in a single variable.

To declare an array, use square brackets to define the variable type:

We’ve now declared a variable that will hold a string array. We can use an array literal to add values to it by placing the items in a comma-separated list inside curly braces:

Example Code:

*You can paste your code and execute to see the output here!

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Java Method Overloading

Multiple methods with the same name but distinct parameters can be combined via method overloading:

Example

Consider the following example, which has two techniques for adding various types of numbers:

Example Code:

*You can paste your code and execute to see the output here!

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Expected Output:

Java Method Equals

The equals() function of the Java String class compares two strings depending on their content. It returns false if any character isn’t found. It returns true if all characters match. The equals() function of the String class takes precedence over the equals() method of the Object class.

Example Code:

*You can paste your code and execute to see the output here!

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Expected Output:

Summary

A method is a group of statements that perform a task and return the outcome to the caller. Without returning anything, a method can accomplish a certain purpose. Methods allow us to reuse code without having to retype it.

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