Overloading

• Overloading is a rule where multiple methods and constructors with the same name are defined together within the class.
• Overloading is of two types: Constructor and Method overloading

Java-Constructor Overloading

• Constructor overloading is the concept in which a class has multiple constructors with the same name but are different in terms of parameters and data type of parameters. 
• It enables you to create objects with different initializations based on the given parameters.

Example:

 package quipoHouse;
 
 class Person {
    private String name;
    private int age;

    public Person(String name) {
        this.name = name;
        this.age = 0;
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void displayInfo() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
    }
}

public class Main {
    public static void main(String[] args) {
        Person person1 = new Person("Alice");
        Person person2 = new Person("Bob", 30);

        person1.displayInfo();
        person2.displayInfo();
    }
}

Output:

Name: Alice
Age: 0
Name: Bob
Age: 30

Java-Method Overloading 

• Method overloading is the concept in which a class has multiple methods with the same name but are different in terms of parameters and data type of parameters. 
• It optimizes the readability of the program.
• Method overloading is similar to constructor overloading, but it applies to methods.

Different ways to overload the methods:

1. Method overloading with differences in the number of parameters:-

Example:

package quipoHouse;

public class Overloading {
	static int add(int a, int b) {
		return a + b;
	}

	static int add(int a, int b, int c) {
		return a + b + c;
	}

	public static void main(String[] args) {
		System.out.println("Method Overloading With different no of parameters :" + Overloading.add(12, 13));
		System.out.println("Method Overloading With different no of parameters :" + Overloading.add(12, 13, 14));
	}
}

Output:

Method Overloading With different no of parameters : 25
Method Overloading With different no of parameters : 39

2. Method overloading with a difference in the data type of parameter:-

Example:

package quipoHouse;

public class Overloading {
	static int add(int a, int b) {
		return a + b;
	}

	static int add(double a, double b) {
		return (int) (a + b);
	}

	public static void main(String[] args) {
		System.out.println("Method Overloading With integer data type:" + Overloading.add(12, 13));
		System.out.println("Method Overloading With double data type:" + Overloading.add(12.6, 13.5));
	}
}

Output:

Method Overloading With integer data type: 25
Method Overloading With double data type:25