Time for action – adding components as class members
To add UI components as class members, edit your TimeItUI class by adding these variables to it:
private static final TestSet[] testSets = new TestSet[] { new LongVsInt(), new StringVsStringBuffer(), new ShortCircuitVsNoShortCircuit() }; private VerticalLayout layout = new VerticalLayout(); private ComboBox combo = new ComboBox("Test"); private final TextField textField = new TextField("Number of iterations", "1000"); private CheckBox checkBox = new CheckBox("Keep previous results"); private Button button = new Button("Time it!"); private VerticalLayout resultsLayout = new VerticalLayout();
What just happened?
The first thing you see, testSets, is just an array of business objects, specifically, an array containing instances of TestSet (take a look at the TestSet interface in the book's source code). Think of TestSet as a single scenario from which we want to obtain timing results. For example, the...