Question

I have this program: It passes on certain test cases. The Demo five has the %.1f to cut down the number to one decimal place. But I get a failed attempt such as:

Enter length: \n 
Enter width: \n 
You entered: 87.3, 2.0, and 174.7\n 
-- Rectangle info --\n 
Length: 87.34\n 
Width: 2.0\n 
Area: 174.68\n

And I know it is because the length and area both have 2 decimal places. Could you help me fix this? Thank you.

Program Content:
import java.util.Scanner;

public class Rectangle {

    public static double getLength(Scanner keyboard) {
        System.out.println("Enter length: ");
        return keyboard.nextDouble();
    }

    public static double getWidth(Scanner keyboard) {
        System.out.println("Enter width: ");
        return keyboard.nextDouble();
    }

    public static double getArea(double length, double width) {
        return length*width;
    }

    public static void displayData(double length, double width) {
        System.out.println("-- Rectangle info --");
        System.out.println("Length: "+length);
    System.out.println("Width: "+width);
    System.out.println("Area: "+(length*width));
    }
}

Demo 5 content:

import org.w3c.dom.css.Rect;

import java.util.Scanner;

public class Demo5
{
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
double length = Rectangle.getLength(keyboard);
double width = Rectangle.getWidth(keyboard);
double area = Rectangle.getArea(length, width);

System.out.printf("You entered: %.1f, %.1f, and %.1f\n", length, width, area);

Rectangle.displayData(length, width);
}
}

Answer 1

Please find the fixed code below along with the output. The issue is while printing the data, it is not formatted, that's why its showing with 2 decimal places:

import java.util.Scanner;

class Rectangle {

    public static double getLength(Scanner keyboard) {
        System.out.println("Enter length: ");
        return keyboard.nextDouble();
    }

    public static double getWidth(Scanner keyboard) {
        System.out.println("Enter width: ");
        return keyboard.nextDouble();
    }

    public static double getArea(double length, double width) {
        return length*width;
    }

    public static void displayData(double length, double width) {
        System.out.println("-- Rectangle info --");
        System.out.printf("Length: %.1f\n", length);
        System.out.printf("Width: %.1f\n", width);
        System.out.printf("Area: %.1f\n", (length*width));
    }
}

class Demo5
{
    public static void main(String[] args)
    {
        Scanner keyboard = new Scanner(System.in);
        double length = Rectangle.getLength(keyboard);
        double width = Rectangle.getWidth(keyboard);
        double area = Rectangle.getArea(length, width);

        System.out.printf("You entered: %.1f, %.1f, and %.1f\n", length, width, area);

        Rectangle.displayData(length, width);
    }
}

------------------------------------------------

OUTPUT: