? Method Declaration & Calling in Java

? Quick Overview

In Java, a method is a block of code that performs a specific task. Methods help in code reusability, modular programming, and better readability. A method must be declared before it can be called.

? Key Concepts

Method declaration defines what the method does
Method calling executes the method
Methods may return a value or be void
Parameters allow passing data to methods

? Syntax / Theory

A method declaration consists of:

Access modifier
Return type
Method name
Parameter list
Method body

? View Code Example

// General syntax of a method declaration in Java
accessModifier returnType methodName(parameters) {
// method body
}

? Code Example(s)

? View Code Example

// Example demonstrating method declaration and calling
class Calculator {

// Method declaration
static int add(int a, int b) {
return a + b;
}

public static void main(String[] args) {

// Method calling
int result = add(10, 20);
System.out.println(result);
}
}

? Live Output / Explanation

Output

The add() method receives two integers, adds them, and returns the result. The returned value is stored in the variable result and printed.

? Interactive Method Simulator

Enter values below to simulate calling the add() method dynamically.

int result = add( , );

> System output will appear here...

? Tips & Best Practices

Use meaningful method names that describe the action
Keep methods short and focused on one task
Reuse methods to avoid duplicate code
Prefer parameters instead of hardcoded values

? Try It Yourself

Create a method to subtract two numbers
Write a method that returns the square of a number
Create a method without return value that prints a message