public class Rectangle
{
    private int width;
    private int height;

    public Rectangle(int theWidth, int theHeight)
    {
        // Only allow nonnegative width and height.
        if (theWidth > 0)
            width = theWidth;
        else
            width = 0;

        if (theHeight > 0)
            height = theHeight;
        else
            height = 0;
    }

    public int getWidth( )
    {
        return width;
    }

    public int getHeight( )
    {
        return height;
    }

    public int getArea( )
    {
        return width * height;
    }

    public String toString( )
    {
        return String.format("%dx%d area=%d",
            width, height, getArea( ));
    }

    public static void main(String[ ] args)
    {
        Rectangle r = new Rectangle(12, 15);
        System.out.println("Width of r is " + r.getWidth( ));
        System.out.println("Height of r is " + r.getHeight( ));
        System.out.println("Area of r is " + r.getArea( ));
        System.out.println("toString output of r is ");
        System.out.println(r);
        System.out.println( );

        // Test behavior of negative width and/or
        // height in constructor.
        System.out.println(new Rectangle(-5, 15));
        System.out.println(new Rectangle(12, -8));
        System.out.println(new Rectangle(-5, -8));
    }

}