/**
 * An aggregation of elements forms a molecule.
 * We consider neither the types of bonds nor the arrangement
 * of the molecule's elements; this class is only used to
 * store the types of elements that comprise a molecule.
 * @author Paul Gestwicki
 */
public class Molecule {

    /**
     * The elements that make up a molecule.
     * This member must be initialized in all constructors.
     */
    private Element[] elements;

    /**
     * Construct a new molecule from the given elements.
     * @param elements an array of elements that make up this
     *    molecule.
     */
    Molecule(Element[] elements) {
	this.elements = new Element[elements.length];
	System.arraycopy(elements, 0, this.elements, 0, elements.length);
    }
}