第三周课后练习

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发布于: 2020 年 11 月 08 日

一：手写单例问题描述：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。
二：用组合模式编写程序问题描述：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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程序如下：
public class Window {
    private Picture picture = new Picture();
    private Button button = new Button();
    private Frame frame = new Frame();
    public void print(String name) {
        System.out.println("print WinForm(" + name + ")");
        picture.print("logo");
        frame.print("frame1");
        button.print("登录");
        button.print("注册");
    }
    public static void main(String[] args) {
        Window window = new Window();
        window.print("WINDOW");
    }
}
class Picture {
    public Picture(){}
    public void print(String name) {
        System.out.println("print Picture(" + name + ")");
    }
}
class Button {
    public Button(){}
    public void print(String buttonName) {
        System.out.println("print Button(" + buttonName + ")");
    }
}
class Frame {
    public Frame(){}
    private Lable lable = new Lable();
    private LinkLable linkLable = new LinkLable();
    private CheckBox checkBox = new CheckBox();
    private TextBox textBox = new TextBox();
    private PasswordBox passwordBox = new PasswordBox();
    public void print(String name) {
        System.out.println("print Frame(" + name + ")");
        lable.print("用户名");
        textBox.print("文本框");
        lable.print("密码");
        passwordBox.print("密码框");
        checkBox.print("复选框");
        lable.print("记住用户名");
        linkLable.print("忘记密码");
    }
}
class Lable {
    public Lable(){}
    public void print(String name) {
        System.out.println("print Lable(" + name + ")");
    }
}
class LinkLable {
    public LinkLable(){}
    public void print(String name) {
        System.out.println("print LinkLable(" + name + ")");
    }
}
class CheckBox {
    public CheckBox(){}
    public void print(String name) {
        System.out.println("print CheckBox(" + name + ")");
    }
}
class TextBox {
    public TextBox(){}
    public void print(String name) {
        System.out.println("print TextBox(" + name + ")");
    }
}
class PasswordBox {
    public PasswordBox(){}
    public void print(String name) {
        System.out.println("print PasswordBox(" + name + ")");
    }
}
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