Java Program to Find Area of circle Using Method Overloading Last Updated : 28 Jul, 2022 Comments Improve Suggest changes Like Article Like Report A circle is a simple shape consisting of all the points in the plane that are equidistant from a point known as the center of the circle. In this article, we will learn how to find the area of the circle using the method overloading. Terminology: Method Overloading: Method overloading allows different methods to have the same name, but different signatures where the signature can differ by the number of input parameters or type of input parameters or both. Area: A quantity that represent the extent of a 2-dimensional figure or shape in the plane is known as an area.Radius: The line segment from the center to any point of the circle is known as radius.Diameter: The line segment whose endpoints lie on the circle and passed through the center is known as the diameter of the circle. It is also known as the largest distance between any two points on the circle.Area of the Circle The area of the circle is the product of the square of the radius of the circle and the value of PI. We can simply calculate the area of the circle using the following formula: Using the radius of the circle: Formula: Area of the circle: A = π * r2 Here, r is the radius of the circle. Using the diameter of the circle: Formula: Area of the circle: A = (π / 4) * d2 Here, r is the radius of the circle. Note: The value of PI in java is 3.141592653589793. Below is the implementation of the above approach: Example 1: Java // Java program to find the area of // the circle using Method Overloading import java.io.*; class Circle { static final double PI = Math.PI; // Overloaded Area() function to // calculate the area of the circle. // It takes one double parameter void Area(double r) { double A = PI * r * r; System.out.println("Area of the circle is :" + A); } // Overloaded Area() function to // calculate the area of the circle. // It takes one float parameter void Area(float r) { double A = PI * r * r; System.out.println("Area of the circle is :" + A); } } class GFG { // Driver code public static void main(String[] args) { // Creating object of Circle class Circle obj = new Circle(); // Calling function obj.Area(5); obj.Area(2.5); } } OutputArea of the circle is :78.53981633974483 Area of the circle is :19.634954084936208 Time Complexity: O(1) Auxiliary Space: O(1) Example 2: Java // Java program to find the area of // the circle when the diameter is given // using Method Overloading import java.io.*; class Circle { static final double PI = Math.PI; // Overloaded Area() function to // calculate the area of the circle. // It takes one double parameter void Area(double D) { double A = (PI / 4) * D * D; System.out.println("Area of the circle is :" + A); } // Overloaded Area() function to // calculate the area of the circle. // It takes one float parameter void Area(float D) { double A = (PI / 4) * D * D; System.out.println("Area of the circle is :" + A); } } class GFG { // Driver code public static void main(String[] args) { // Creating object of Circle class Circle obj = new Circle(); // Calling function obj.Area(10); obj.Area(20.4); } } OutputArea of the circle is :78.53981633974483 Area of the circle is :326.851299679482 Time complexity: O(1) since performing constant operations Auxiliary Space: O(1) Comment More infoAdvertise with us Next Article Java Program to Find Area of circle Using Method Overloading ankita_saini Follow Improve Article Tags : Java Java Programs Practice Tags : Java Similar Reads Java Program to Find Area of Square Using Method Overloading A square is a simple flat shape in a plane, defined by four points at the four corners. 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