What is the difference between @Before and @BeforeClass annotations?

• @Before
public void method()
  The Before annotation indicates that this method must be executed before each test in the class, so as to execute some preconditions necessary for the test.
• @BeforeClass
public static void method()
  The BeforeClass annotation indicates that the static method to which is attached must be executed once and before all tests in the class. That happens when the test methods share computationally expensive setup (e.g. connect to database).