setUp() and setUpBeforeClass()

The @BeforeClass and @AfterClass annotated methods will be run exactly once during your test run - at the very beginning and end of the test as a whole, before anything else is run. In fact, they're run before the test class is even constructed, which is why they must be declared static.

The @Before and @After methods will be run before and after every test case, so will probably be run multiple times during a test run.

So let's assume you had three tests in your class, the order of method calls would be:

setUpBeforeClass()

  (Test class first instance constructed and the following methods called on it)
    setUp()
    test1()
    tearDown()

  (Test class second instance constructed and the following methods called on it)
    setUp()
    test2()
    tearDown()

  (Test class third instance constructed and the following methods called on it)
    setUp()
    test3()
    tearDown()

tearDownAfterClass()