public interface Window{
    public void print();
}

public class Component implements Window {
    private ArrayList<Window> subComponents = new ArrayList<Window>();
    private String name;
    private String description;
    public Component(String name,String description) {
        this.name = name;
        this.description = description;
    }
  	// add方法用于添加父子结点关系
    public void add(Window component) {
        this.subComponents.add(component);
    }
    public ArrayList<Window> getChild(){
        return this.subComponents;
    }
    public void print(){
        System.out.println("print "+this.name + "(" + this.description+")");
        for (Window component:this.subComponents) {
            component.print();
        }
    }
}

public class Leaf implements Window {
    private String name;
    private String description;
    public Leaf(String name,String description) {
        this.name = name;
        this.description = description;
    }
    
    public void print(){
        System.out.println("print "+this.name + "(" + this.description+")");
    }
}

public static void main(String[] args) {
        // 定义所有节点
        Component winForm = new Component("WinForm","WINDOW窗口");
        Component frame = new Component("Frame","FRAME1");
        Leaf picture = new Leaf("Picture","LOGO图片");
        Leaf buttonLogIn = new Leaf("Button","登录");
        Leaf buttonRegister = new Leaf("Button","注册");
        Leaf lableUserName = new Leaf("Lable","用户名");
        Leaf userNameTextbox = new Leaf("TextBox","文本框");
        Leaf lablePassword = new Leaf("Lable","密码");
        Leaf passowrdTextbox = new Leaf("TextBox","密码框");
        Leaf checkBox = new Leaf("CheckBox","复选框");
        Leaf lableRemember = new Leaf("Lable","记住用户名");
        Leaf link = new Leaf("LinkLable","忘记密码");
        // 按照层次关系，把叶子节点放入其父节点
        winForm.add(picture);
        winForm.add(buttonLogIn);
        winForm.add(buttonRegister);
        winForm.add(frame);
        frame.add(lableUserName);
        frame.add(userNameTextbox);
        frame.add(lablePassword);
        frame.add(passowrdTextbox);
        frame.add(checkBox);
        frame.add(lableRemember);
        frame.add(link);
				
        winForm.print();
    }