第三周

public interface WinForm {
    void add(WinForm winForm);
    void remove(WinForm winForm);
    void print();
}
public class Frame implements WinForm{
    private List<WinForm> list = new ArrayList<>();
    private String name;
    public Frame(String name) {
        this.name = name;
    }
    @Override
    public void add(WinForm winForm) {
        list.add(winForm);
    }
    @Override
    public void remove(WinForm winForm) {
        list.remove(winForm);
    }
    @Override
    public void print() {
        System.out.println(this.name);
        for (WinForm winForm : list){
            winForm.print();
        }
    }
}
public class Element implements WinForm {
    private String name;
    public Element(String name) {
        this.name = name;
    }
    @Override
    public void add(WinForm winForm) {
    }
    @Override
    public void remove(WinForm winForm) {
    }
    @Override
    public void print() {
        System.out.println(name);
    }
    public static void main(String[] args) {
        WinForm winForm = new Frame("WinForm(WINDOW窗口)");
        winForm.add(new Element("Picture(LOGO图片)"));
        winForm.add(new Element("Button(登录)"));
        winForm.add(new Element("Button(注册)"));
        WinForm frame = new Frame("Frame(FRAME1)");
        frame.add(new Element("Lable(用户名)"));
        frame.add(new Element("TextBox(文本框)"));
        frame.add(new Element("Lable(密码)"));
        frame.add(new Element("PasswordBox(密码框)"));
        frame.add(new Element("CheckBox(复选框)"));
        frame.add(new Element("TextBox(记住用户名)"));
        frame.add(new Element("LinkLable(忘记密码)"));
        winForm.add(frame);
        winForm.print();
    }
}