### Question:
BondEnergies { public synchronized static BondEnergies getInstance() throws CDKException { if (null == instance) { instance = new BondEnergies(); } return instance; } protected  BondEnergies(); synchronized static BondEnergies getInstance(); synchronized int getEnergies(IAtom sourceAtom, IAtom targetAtom, Order bondOrder); synchronized int getEnergies(String sourceAtom, String targetAtom, Order bondOrder); synchronized int getEnergies(IBond bond);  }### Answer:
@Test public void testGetInstance() throws Exception { BondEnergies energies = BondEnergies.getInstance(); Assert.assertNotNull(energies); }