In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Tests should be readable and expressive; for example, a test that verifies unauthorized access can be written as testUnauthorizedAccess() or rather when_an_unauthorized_user_accesses_the_system_then_raises_secuirty_error()."

A block of code is set as follows:

@Test
  public void currencyRoundsOff() throws Exception {
    assertNotNull(CurrencyFormatter.format(100.999));
    assertTrue(CurrencyFormatter.format(100.999).contains("$"));
    assertEquals("$101.00", CurrencyFormatter.format(100.999));
  }

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

public class LocaleTest {
  private Locale defaultLocale;
  @Before
  public void setUp() {
    defaultLocale = Locale.getDefault();
    Locale.setDefault(Locale.GERMANY);
  }
  @After
  public void restore() {
    Locale.setDefault(defaultLocale);
  }
  @Test
  public void currencyRoundsOff() throws Exception {
    assertEquals("$101.00", CurrencyFormatter.format(100.999));
  }
}

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "Go to the Libraries tab in the project's build path."