package test3;

/**
 * This class represents an elastic band.  Each elastic band
 * has a length.
 */
public class ElasticBand 
{

    /**
     * Returns the length of this elastic band.
     * 
     * @return the length of this elastic band.
     */
    public double getLength() 
    {

    }

    /**
     * Sets the length of this elastic band to the given length.
     * 
     * @param length the new length of this elastic band.
     * @pre. length > 0
     */
    public void setLength(double length) 
    {

    }
    
    /**
     * Returns an elastic band with the given length.
     * 
     * @param length the length of the elastic band.
     * @pre. length > 0
     * @return an elastic band with the given length.
     */
    public static ElasticBand getInstance(double length)
    {

    }
    
    /**
     * Tests whether this elastic band is the same as the
     * given object.  Two elastic bands are the same if
     * their length differ by less than 0.01.
     * 
     * @param object an object.
     * @return true if this elastic band is the same as the
     * given object, false otherwise.
     */
    public boolean equals(Object object)
    {

    }
    
    /**
     * Stretches the length of this elastic band by the given factor.
     * For example, if the length of this elastic band is 3 and it
     * is stretched by a factor 1.5 then its length becomes 4.5.
     * 
     * @param factor the stretch factor
     * @pre. factor > 0 && factor < 5
     */
    public void stretch(double factor)
    {

    }
}