第三周作业

public abstract class Window{
    protected String name ;
    protected List<Window> windows = new ArrayList<Window>();
    public Window(String name){
        this.name = name;
    }
    void add(Window window){
        windows.add(window);
    };
    public void print(){
        System.out.println("print "+this.getClass().getName()+"("+name+")");
        for(Window window:windows){
            window.print();
        }
    };
}

public class Button extends Window {
    public Button(String name) {
        super(name);
    }
}

 public static void main(String[] args) {
        Window winForm = new WinForm("Windows 窗口");
        winForm.add(new Picture("LOGO 图片"));
        winForm.add(new Button("登陆"));
        winForm.add(new Button("注册"));
        Frame frame1 = new Frame("FRAME1");
        winForm.add(frame1);
        frame1.add(new Label("用户名"));
        frame1.add(new TextBox("文本框"));
        frame1.add(new Label("密码"));
        frame1.add(new PasswordBox("密码框"));
        frame1.add(new CheckBox("复选框"));
        frame1.add(new TextBox("记住用户名"));
        frame1.add(new LinkLabel("忘记密码"));
        winForm.print();
    }