#CoreJava/MethodsInJava

What is Method?

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• A method is a block of code that performs a specific task in programming.
• It can take input (called parameters) and return an output.
• Methods help reuse code and make programs easier to manage.

Naming Convention a Method

• Method names should use camelCase.
• Method names should be short and meaningful.

Method Calling & Method Declaration Syntax

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class ClassName{
	public static void main(String[] args){
		ClassName objectName = new ClassName();
		// Method Calling
		objectName.methodName();
	}

	// Method Signature
	returnType dataType methodName(){
		// set of instruction
		return ;
	}
}

• Objectname + Mehtodname (Activity Name)
• objectName.methodName() - objectName-மிருக்கு பிறகு dot(.) வைத்து methodName() குடுக்க வேண்டும்.
• () - inputs கொடுப்பதற்கு பயன்படுத்துவோம்.
• Method definition உள்ளே இன்னொரு method call செய்யலாம். Ex: Main Method

Example:

class Calculator{
	public static void main(String[] args){
		Calculator casio = new Calculator();
		// Method Calling
		int result = casio.add(4,5);
		System.out.println(result);
	}

	// Method Signature
	int add(int num1, int num2){
		// Method Defination
		int c = num1 + num2;
		return c;
	}
}

How many types of methods in java?

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• Pre-defined Methods: These are built-in methods in Java that are available to use.
• User-defined Methods: We can create our own method based on our requirements.
• Static Method
• Instance Method
• Abstract Method
• Factory Method

Main Method

Method means activity.
Important Activity - Main Method

• Program execution starts from main method
• Main method inside the class or part of class.