Здравейте, реших задачата, judge я приема. Въпросът ми е как да форматирам така, че ако резултата ми е цяло число да не излизат нулите след десетичната точка? (както е в примерните изходи)

package com.company;
import java.util.DoubleSummaryStatistics;
import java.util. Scanner;
/**
 * Created by entropy on 3/23/2017.
 */
public class areaFigures {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        String figure=scanner.nextLine();




        Double area=0.0;

        if (figure.equalsIgnoreCase("square")){
            System.out.println("Input side");
            Double side=Double.parseDouble(scanner.nextLine());
            area=side*side;
                    } else if (figure.equalsIgnoreCase("rectangle")) {
            System.out.println("Input side1");
            Double side1=Double.parseDouble(scanner.nextLine());
            System.out.println("Input side2");
            Double side2= Double.parseDouble(scanner.nextLine());
            area = side1 * side2;
        }else if (figure.equalsIgnoreCase("circle")) {
            System.out.println("Input radius");
            Double radius= Double.parseDouble (scanner.nextLine());
            area = Math.PI * radius * radius;
        }else if(figure.equalsIgnoreCase("triangle")){
            System.out.println("Input side");
            Double side= Double.parseDouble (scanner.nextLine());
            System.out.println("Input height");
            Double height= Double.parseDouble(scanner.nextLine());
            area=(side*height)/2;
        }
        System.out.printf("%.3f", area);
    }
}