第一步是为每个 UI 组件创建访问器方法，如清单 2 所示。按照该方式，我可以在需要时获取它们。
清单 2. 向 UI 组件添加访问器方法使其可用
public class WordModule implements EntryPoint {
private Label label;
private Button button;
private TextBox textBox;
private Label outputLabel;
protected Button getButton() {
if (this.button == null) {
this.button = new Button("Submit");
}
return this.button;
}
protected Label getLabel() {
if (this.label == null) {
this.label = new Label("Word: ");
}
return this.label;
}
protected Label getOutputLabel() {
if (this.outputLabel == null) {
this.outputLabel = new Label();
}
return this.outputLabel;
}
protected TextBox getTextBox() {
if (this.textBox == null) {
this.textBox = new TextBox();
this.textBox.setVisibleLength(20);
}
return this.textBox;
}
}
文章来源于领测软件测试网 https://www.ltesting.net/
