// This Java Program determines the area and
// perimeter of a rectangle.

import javax.swing.JOptionPane;

public class Rectangle
{
    public static void main(String[] args)
    {
	      double width, length, area, perimeter;			              //Line 1

 	      String lengthStr, widthStr, outputStr;			              //Line 2

 	      lengthStr =
	            JOptionPane.showInputDialog("Enter the length: ");	//Line 3
	      length = Double.parseDouble(lengthStr);			              //Line 4

	      widthStr =
	            JOptionPane.showInputDialog("Enter the width: ");	  //Line 5
        width = Double.parseDouble(widthStr);			                //Line 6

	      area = length * width;						                        //Line 7
 	      perimeter = 2 * (length + width);				                  //Line 8

	      outputStr = "Length: " + length + "\n" +
			              "Width: " + width + "\n" +
			              "Area: " + area + " square units\n" +
                    "Perimeter: " + perimeter + " units\n";	      //Line 9

 	      JOptionPane.showMessageDialog(null, outputStr,
  				                            "Rectangle",
		                        JOptionPane.INFORMATION_MESSAGE);	    //Line 10

	      System.exit(0);							                              //Line 11
    }
}