Code:
    import java.util.Scanner;
     
    public class rectangle
    {
    public static void main( String[] args )
    {
    rectangle rec = new rectangle();
     
     
    }
     
    double length = 1.0
    double width = 1.0
    double perimeter
    double area
     
    public class calcPerimeter()
    {
    perimeter = 2*length + 2*width;
    }
     
     
    public class calcArea()
    {
    area = length*width;
    }
     
     
    private double getLength()
    {
    return length;
    }
     
    private double getWidth()
    {
    return width;
    }
     
    private double setLength( length )
    {
    double recLength = length;
    if (recLength > 0.0 && recLength < 20.0) {
    length = recLength;
    }
    }
     
    private double setWidth( width )
    {
    double recWidth = width;
    if (recWidth > 0.0 && recWidth < 20.0) {
    width = recWidth;
    }
    }
     
    private void toString()
    {
    System.out.printf("%s%.2f" + " " "%s%.2f" + " " + "%s%.2f" + " " + "%s%.2f" + " " +,
    length, width, perimeter, area);
    }
     
    } // end main


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