Java program to calculate triangle circumference

Following program shows you how to calculate triangle circumference.
This program gets triangle sides from user and calculates circumference and prints it using following formula
Circumference = side1 + side2 + side3

import java.util.Scanner;

public class MathGeometry2 {

	public static void main(String[] args) {

		double triangleSide1;
		double triangleSide2;
		double triangleSide3;

		Scanner in = new Scanner(System.in);

		System.out.println("Enter the side1 of triangle:");
		triangleSide1 = in.nextDouble();

		System.out.println("Enter the side2 of triangle:");
		triangleSide2 = in.nextDouble();

		System.out.println("Enter the side3 of triangle:");
		triangleSide3 = in.nextDouble();

		double circumferenceOfTriangle = triangleSide1 + triangleSide2 + triangleSide3;
		System.out.println("Circumference of triangle is: " + circumferenceOfTriangle);

	}
}

Output:

Enter the side1 of triangle:
20
Enter the side2 of triangle:
10
Enter the side3 of triangle:
30
Circumference of triangle is: 60.0