import java.util.List;
import java.util.ArrayList;
interface Widget {
  void print();
}
interface WidgetContainer extends Widget {
  void addWidget(Widget widget);
}
abstract class Component {
  private String label;
  protected void setLabel(String label) {
    this.label = label;
  }
  protected String getLabel() {
    return label;
  }
}
class WinForm extends Component implements WidgetContainer {
  private List<Widget> widgets = new ArrayList();
  
  public WinForm(String label) {
    setLabel(label);
  }
  public void print() {
      System.out.println("print WinForm(" + getLabel() +")");
      for(Widget w : widgets) {
        w.print();
      }
  }
  public void addWidget(Widget widget) {
      widgets.add(widget);
  }
}
class Frame extends Component implements WidgetContainer {
  private List<Widget> widgets = new ArrayList();
  
  public Frame(String label) {
    setLabel(label);
  }
  public void print() {
      System.out.println("print Frame(" + getLabel() +")");
      for(Widget w : widgets) {
        w.print();
      }
  }
  public void addWidget(Widget widget) {
      widgets.add(widget);
  }
}
class Picture extends Component implements Widget {
  public Picture(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print Picture(" + getLabel() +")");
  }
}
class Button extends Component implements Widget {
  public Button(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print Button(" + getLabel() +")");
  }
}
class Label extends Component implements Widget {
  public Label(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print Label(" + getLabel() +")");
  }
}
class TextBox extends Component implements Widget {
  public TextBox(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print TextBox(" + getLabel() +")");
  }
}
class PasswordBox extends Component implements Widget {
  public PasswordBox(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print PasswordBox(" + getLabel() +")");
  }
}
class CheckBox extends Component implements Widget {
  public CheckBox(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print CheckBox(" + getLabel() +")");
  }
}
class LinkLabel extends Component implements Widget {
  public LinkLabel(String label) {
    setLabel(label);
  }
  public void print() {
    System.out.println("print LinkLabel(" + getLabel() +")");
  }
}
class Main {
  public static void main(String[] args) {
    WidgetContainer winForm = new WinForm("WINDOW窗口");
    Widget picLogo = new Picture("LOGO图片");
    Widget btnLogin = new Button("登录");
    Widget btnRegister = new Button("注册");
    WidgetContainer frame = new Frame("FRAME1");
    Widget labelUserName = new Label("用户名");
    Widget textUserName = new TextBox("文本框");
    Widget pdLabel = new Label("密码");
    Widget pdPassword = new PasswordBox("密码框");
    Widget cbCheckBox = new CheckBox("复选框");
    Widget textRememberMe = new TextBox("记住用户名");
    Widget llForgotPw = new LinkLabel("忘记密码");
    frame.addWidget(labelUserName);
    frame.addWidget(textUserName);
    frame.addWidget(pdLabel);
    frame.addWidget(pdPassword);
    frame.addWidget(cbCheckBox);
    frame.addWidget(textRememberMe);
    frame.addWidget(llForgotPw);
    winForm.addWidget(picLogo);
    winForm.addWidget(btnLogin);
    winForm.addWidget(btnRegister);
    winForm.addWidget(frame);
    winForm.print();
  }
}