Java Program to calculate Area of Circle

You can calculate the area of a circle in Java by just writing a class and a method. All you need to know is the formula to calculate the area of circle and trick to get input from the user in Java. If you know these two already than the calculating area of a circle is very easy. Since every program must have a class in Java, we need to create a class. I have created a class called Circle for our examples purpose. Now, since the execution of Java program starts from the main method, I have provided a public static void main() method in our program. This single method is enough to put all the code required for this program e.g. getting input from the user, calculating area and displaying area of a circle in the console. But, for better coding experience purpose, we'll just create a method to calculate the area of a circle.

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