架构师训练营第 0 期第 3 周作业

public abstract class Component {

    private String description;

    public Component(String description) {
        this.description = description;
    }

    void print() {
        System.out.println(description);
    }
}

public class Leaf extends Component {

    public Leaf(String description) {
        super(description);
    }

}

public class Composite extends Component {

    public Composite(String description) {
        super(description);
    }

    private List<Component> componentList = new ArrayList<>();

    public void add(Component component) {
        this.componentList.add(component);
    }

    public void remove(Component component) {
        this.componentList.remove(component);
    }

    public List<Component> getChildren() {
        return this.componentList;
    }

}

public class Client {

    public static void main(String[] args) {
        Composite root = new Composite("WINDOW窗口");
        Leaf picture = new Leaf("LOGO图片");
        root.add(picture);
        Leaf button1 = new Leaf("登录");
        root.add(button1);
        Leaf button2 = new Leaf("注册");
        root.add(button2);
        Composite frame = new Composite("FRAME1");
        root.add(frame);
        Leaf label = new Leaf("用户名");
        frame.add(label);
        Leaf textBox = new Leaf("文本框");
        frame.add(textBox);
        Leaf password = new Leaf("密码");
        frame.add(password);
        Leaf passwordBox = new Leaf("密码框");
        frame.add(passwordBox);
        Leaf checkbox = new Leaf("复选框");
        frame.add(checkbox);
        Leaf textBox2 = new Leaf("复选框");
        frame.add(textBox2);
        Leaf linkLabel = new Leaf("忘记密码");
        frame.add(linkLabel);

        root.print();
        show(root);
    }

    public static void show(Composite root) {
        for (Component component : root.getChildren()) {
            component.print();
            if (component instanceof Composite) {
                show((Composite) component);
            }
        }
    }

}