Element extends ChemObject implements Serializable, IElement, Cloneable { public Element() { super(); } Element();  Element(IElement element);  Element(String symbol);  Element(String symbol, Integer atomicNumber); @Override Integer getAtomicNumber(); @Override void setAtomicNumber(Integer atomicNumber); @Override String getSymbol(); @Override void setSymbol(String symbol); @Override String toString(); @Override Object clone(); @Override boolean compare(Object object);  }
@Test public void testElement() { IElement e = new Element(); Assert.assertTrue(e instanceof IChemObject); }