架构师训练营 - 作业 - 第三讲
发布于: 2020 年 06 月 23 日
作业一：
1. 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。
2. 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。
1，
2，首先定义接口
public interface WindowElement { void print(); void addLeaf(WindowElement element); void removeLeaf(WindowElement element); void showLeaf();}复制代码
然后定义通用组件的实现类
import java.util.ArrayList;import java.util.List;
public abstract class ComponentsElement implements WindowElement { private List<WindowElement> leafList = new ArrayList<>(); private String name ;
public ComponentsElement(String name){ this.name = name; }
@Override public void print() { System.out.println("print " + this.getClass().getSimpleName() +"(" + this.name +")"); for (WindowElement leaf:leafList) { leaf.print(); } }
@Override public void addLeaf(WindowElement element) { leafList.add(element); }
@Override public void removeLeaf(WindowElement element) { leafList.remove(element); }
@Override public void showLeaf() { for (WindowElement leaf:leafList) { leaf.showLeaf(); } }}
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下面挨个定义所有组件，按字母顺序写在下面了。
public class Button extends ComponentsElement { public Button(String name) { super(name); }}public class CheckBox extends ComponentsElement { public CheckBox(String name) { super(name); }}public class Frame extends ComponentsElement { public Frame(String name) { super(name); }}public class Lable extends ComponentsElement { public Lable(String name) { super(name); }}public class LinkLable extends ComponentsElement { public LinkLable(String name) { super(name); }}public class PasswordBox extends ComponentsElement { public PasswordBox(String name) { super(name); }}public class Picture extends ComponentsElement { public Picture(String name) { super(name); }}public class TextBox extends ComponentsElement { public TextBox(String name) { super(name); }}public class WinForm extends ComponentsElement { public WinForm(String name) { super(name); }}
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最后是测试类
public class test { public static void main(String[] args) { ComponentsElement window = new WinForm("WINDOW窗口"); window.addLeaf(new Picture("LOGO图片")); window.addLeaf(new Button("登录")); window.addLeaf(new Button("注册")); ComponentsElement frame1 = new Frame("FRAME1"); frame1.addLeaf(new Lable("用户名")); frame1.addLeaf(new TextBox("文本框")); frame1.addLeaf(new Lable("密码")); frame1.addLeaf(new PasswordBox("密码框")); frame1.addLeaf(new CheckBox("复选框")); frame1.addLeaf(new TextBox("记住用户名")); frame1.addLeaf(new LinkLable("忘记密码")); window.addLeaf(frame1); window.print(); }}
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输出结果：
print WinForm(WINDOW窗口)print Picture(LOGO图片)print Button(登录)print Button(注册)print Frame(FRAME1)print Lable(用户名)print TextBox(文本框)print Lable(密码)print PasswordBox(密码框)print CheckBox(复选框)print TextBox(记住用户名)print LinkLable(忘记密码)
Process finished with exit code 0复制代码
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发布于: 2020 年 06 月 23 日阅读数: 53
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