Method Overriding VS Overloading

What is the difference between overriding and overloading in Java? Simply put the difference between them is that method overloading means when methods with the same name but different parameters are usually under one class while the method overriding is when a child class manipulates a method from its parent without changing any parameters.

Overloading VS Overriding

Common

Happens when we manipulate methods with the same name

Differences

Overloading	Overriding
Extends functionalities of a method with different parameters	Customizes functionalities of the parent method in a child class
Can be used for inheritance	Must be an inheritance relation
Different parameters	Same parameters
Can use different return types	Cannot use different return types
Can have different access modifier	The child's access modifier can't be less than the parent's
Can throw different errors	Can't throw different or broader errors

Overriding Example

Overloading Example

public static int getBucketCount(double width, double height, double areaPerBucket, int extraBuckets) {
    if (width <= 0 || height <= 0 || areaPerBucket <= 0) {
        return -1;
    }
    double area = width * height;
    double numberOfBucketCal = area / areaPerBucket;
    int numberOfBucket = (int) Math.ceil(numberOfBucketCal);
    return numberOfBucket + extraBuckets;
}

public static int getBucketCount(double width, double height, double areaPerBucket) {
    if (width <= 0 || height <= 0 || areaPerBucket <= 0) {
        return -1;
    }
    double area = width * height;
    double numberOfBucketCal = area / areaPerBucket;
    int numberOfBucket = (int) Math.ceil(numberOfBucketCal);
    return numberOfBucket;
}

public static int getBucketCount(double area, double areaPerBucket) {
    if (area <= 0 || areaPerBucket <= 0) {
        return -1;
    }
    double numberOfBucketCal = area / areaPerBucket;
    int numberOfBucket = (int) Math.ceil(numberOfBucketCal);
    return numberOfBucket;
}

We have seen the difference between method overloading and method overriding.