Vaadin 7 UI Design By Example Beginner's Guide

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, ...