架构师训练营 - 第三周作业
发布于: 2020 年 06 月 24 日
作业一：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。
作业二：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。
最终实现的代码
public class Application { public static void main(String[] args) { CompoundWidget winForm = new WinForm("WINDOW窗口"); winForm.add( new Picture("LOGO图片"), new Button("登录"), new Button("注册"), new Frame("FRAME1", new Label("用户名"), new TextBox("文本框"), new Label("密码"), new PasswordBox("密码框"), new CheckBox("复选框"), new TextBox("记住用户名"), new LinkLabel("忘记密码") ) ); winForm.render(); } /** * ==========程序运行结果========= * * print WinForm(WINDOW窗口) * print Picture(LOGO图片) * print Button(登录) * print Button(注册) * print Frame(FRAME1) * print Label(用户名) * print TextBox(文本框) * print Label(密码) * print PasswordBox(密码框) * print CheckBox(复选框) * print TextBox(记住用户名) * print LinkLabel(忘记密码) */}复制代码
设计抽象：Widget -> BaseWidget -> CompoundWidget
interface Widget { String getName(); void render();}
abstract class BaseWidget implements Widget{ private String name; public BaseWidget(String name){ this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; }}
abstract class CompoundWidget extends BaseWidget { protected List<Widget> children = new ArrayList<>(); public CompoundWidget(String name, Widget... widgets) { super(name); add(widgets); } public void add(Widget widget) { this.children.add(widget); } public void add(Widget...widgets){ this.children.addAll(Arrays.asList(widgets)); } public void remove(Widget widget) { this.children.remove(widget); } public void remove(Widget...widgets){ this.children.removeAll(Arrays.asList(widgets)); } @Override public void render() { for (Widget widget : children) { widget.render(); } }}复制代码
CompoundWidget 实现类
class WinForm extends CompoundWidget{ public WinForm(String name, Widget... widgets) { super(name, widgets); } @Override public void render() { System.out.println("print WinForm(" + this.getName() + ")"); super.render(); }}
class Frame extends CompoundWidget{ public Frame(String name, Widget... widgets) { super(name, widgets); } @Override public void render() { System.out.println("print Frame(" + this.getName() + ")"); super.render(); }}复制代码
BaseWidget 实现 t 类
class Picture extends BaseWidget {
public Picture(String name) { super(name); }
@Override public void render() { System.out.println("print Picture(" + this.getName() + ")"); }}
class Button extends BaseWidget {
public Button(String name) { super(name); }
@Override public void render() { System.out.println("print Button(" + this.getName() + ")"); }}
class Label extends BaseWidget {
public Label(String name) { super(name); }
@Override public void render() { System.out.println("print Label(" + this.getName() + ")"); }}
class TextBox extends BaseWidget {
public TextBox(String name) { super(name); }
@Override public void render() { System.out.println("print TextBox(" + this.getName() + ")"); }}
class PasswordBox extends BaseWidget {
public PasswordBox(String name) { super(name); }
@Override public void render() { System.out.println("print PasswordBox(" + this.getName() + ")"); }}
class CheckBox extends BaseWidget {
public CheckBox(String name) { super(name); }
@Override public void render() { System.out.println("print CheckBox(" + this.getName() + ")"); }}
class LinkLabel extends BaseWidget {
public LinkLabel(String name) { super(name); }
@Override public void render() { System.out.println("print LinkLabel(" + this.getName() + ")"); }}复制代码
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发布于: 2020 年 06 月 24 日阅读数: 60
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