Function or Method Overloading with Different Data Type in Java

Introduction

Function or Method Overloading with different data type in Java is a classic Java console program that demonstrates the concept with complete source code and sample output. Object-oriented programming models real entities with classes, objects, inheritance and polymorphism.

This tutorial walks through the program line by line, explains how the logic works, and highlights best practices you can apply in your own code.

Definition and Overview

• A Class has multiple methods of the same name with different parameters is called Method overloading.
• This will allow one function call to perform different tasks depending on method parameters.
• Method overloading is also known as Static Polymorphism.
• Overload the method in Java, changing number of arguments and changing the data type
• Only based on return type, overloading is not possible in Java,
• Method overloading increases the readability and reliability of the program.

Method Overloading with different data type Example Program

class MethodOverloadingExample{
	public void overloadingMethod(int num,String string){
		System.out.println("Method with integer and String inputs is called.");
	}
	public void overloadingMethod(int num1,float num2){
		System.out.println("Method with integer and float inputs is called.");
	}
}

class MethodOverloadingWithDifferentDataTypes{
	public static void main(String[] args){
		MethodOverloadingExample obj=new MethodOverloadingExample();
		obj.overloadingMethod(10,"Overloading");
		obj.overloadingMethod(1,5.3f);
	}
}

Sample Output

Method with integer and String inputs is called.
Method with integer and float inputs is called.

When to use

Use OOP examples when modelling entities with state and behaviour in larger applications.

How it works

1. Execution begins in the main method — the JVM calls this method when you run the class.

2. A println / print call writes text to the console — part of the sample output below.

3. A println / print call writes text to the console — part of the sample output below.

4. MethodOverloadingExample obj=new MethodOverloadingExample(); updates a variable used in the calculation or output.

5. Compare your console output with the sample output for Function or Method Overloading with different data type in Java to confirm the program behaves correctly.

Best Practices

• Use meaningful variable and class names that describe their purpose.
• Compile and run the program locally — modify values to see how output changes.
• Read compiler errors carefully; they usually point to the exact line to fix.

Common Mistakes

• Copying code without understanding each line — practice by changing one statement at a time.
• Mismatching the public class name and the .java filename.
• Forgetting semicolons at the end of statements.