import javax.swing.JOptionPane; public class Driver { public static void main(St

ID: 3860663 • Letter: I

Question

import javax.swing.JOptionPane;

public class Driver {

   public static void main(String[] args) {
       Rectangle tennisCourt = null;
       double width;
       double length;
       width = Double.parseDouble(JOptionPane.showInputDialog(null, "Enter Length: "));
       length = Double.parseDouble(JOptionPane.showInputDialog(null, "Enter Width: " ));
        tennisCourt.setLength(length);
        tennisCourt.setWidth(width);
        JOptionPane.showMessageDialog(null, "The area of a rectangle with a length "
               + "of " + getLength() + " and a width of " + getWidth() + " is " + getArea() );
   }

}

public class Rectangle {
private double width;
private double length;
public Rectangle()
{
    width = 0.0;
    length = 0.0;
}
public Rectangle(double newWidth, double newLength)
{
    width = newWidth;
    length = newLength;
}
public void setWidth(double newWidth)
{
    width = newWidth;
}

public void setLength(double newLength)
{
length = newLength;
}

public double getWidth()
{
return width;
}
public double getLength()
{
return length;
}

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

use the get member functions to display the area?

Explanation / Answer

import javax.swing.JOptionPane;

/**
*
* @author Sam
*/
public class RectangleDriver {

    public static void main(String[] args) {
        Rectangle tennisCourt = new Rectangle();
        double width;
        double length;
        width = Double.parseDouble(JOptionPane.showInputDialog(null, "Enter Length: "));
        length = Double.parseDouble(JOptionPane.showInputDialog(null, "Enter Width: "));
        tennisCourt.setLength(length);
        tennisCourt.setWidth(width);
        JOptionPane.showMessageDialog(null, "The area of a rectangle with a length "
                + "of " + tennisCourt.getLength() + " and a width of " + tennisCourt.getWidth() + " is " + tennisCourt.getArea());
    }

}

class Rectangle {

private double width;
private double length;

    public Rectangle() {
        width = 0.0;
        length = 0.0;
    }

    public Rectangle(double newWidth, double newLength) {
        width = newWidth;
        length = newLength;
    }

    public void setWidth(double newWidth) {
        width = newWidth;
    }

    public void setLength(double newLength) {
        length = newLength;
    }

    public double getWidth() {
        return width;
    }

    public double getLength() {
        return length;
    }

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

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import javax.swing.JOptionPane; public class Driver { public static void main(St

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