Week 3 命题作业

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发布于: 2020 年 10 月 18 日
第 1 题：请在草稿纸上手写一个单例模式的实现代码，拍照提交作业。
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第 2 题：请用组合设计模式编写程序，打印输出图 1 的窗口，窗口组件的树结构如图 2 所示，打印输出示例参考图 3。
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组件类：Component
@Data
public class Component {
    private String name;
    private String content;
    private List<Component> subComponentList;
    public Component(String name, String content) {
        this.name = name;
        this.content = content;
    }
    public void addSubComponent(Component component) {
        if (subComponentList == null) {
            subComponentList = new ArrayList<>();
        }
        subComponentList.add(component);
    }
    public void print() {
        System.out.println("print " + name + "(" + content + ")");
        if (subComponentList != null && subComponentList.size() > 0) {
            subComponentList.forEach(Component::print);
        }
    }
}
客户端（使用组件类）
public class Client {
    public static void main(String[] args) {
        Component winForm = new Component("WinForm", "WINDOW窗口");
        Component picture = new Component("Picture", "LOGO图片");
        Component button1 = new Component("Button", "登录");
        Component button2 = new Component("Button", "注册");
        Component frame = new Component("Frame", "FRAME1");
        Component label1 = new Component("Label", "用户名");
        Component textBox1 = new Component("TextBox", "文本框");
        Component label2 = new Component("Label", "密码");
        Component passwordBox = new Component("PasswordBox", "密码框");
        Component checkBox = new Component("CheckBox", "复选框");
        Component textBox2 = new Component("TextBox", "记住用户名");
        Component linkLabel = new Component("LinkLabel", "忘记密码");
        winForm.addSubComponent(picture);
        winForm.addSubComponent(button1);
        winForm.addSubComponent(button2);
        winForm.addSubComponent(frame);
        frame.addSubComponent(label1);
        frame.addSubComponent(textBox1);
        frame.addSubComponent(label2);
        frame.addSubComponent(passwordBox);
        frame.addSubComponent(checkBox);
        frame.addSubComponent(textBox2);
        frame.addSubComponent(linkLabel);
        winForm.print();
    }
}
输出结果
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