架构师训练营 -week03- 作业

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发布于: 2020 年 10 月 03 日

作业一：手写单例模式手写了两种：饿汉式和静态方法类的方式，应该是日常工作中比较常见的两种写法。
其他还有：懒汉式，双重检测，还有枚举的方式。
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作业二：组合模式实践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 
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实现方法：
public interface Component {
  void print();
}
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public abstract class BaseComponent implements Component {
  private String name;
  private String function;
  private List<Component> componentList;
  public BaseComponent(String name, String function) {
    this.name = name;
    this.function = function;
    componentList = new ArrayList<>();
  }
  public void addComponent(Component component) {
    componentList.add(component);
  }
  public void removeComponent(Component component) {
    if (componentList.contains(component)) {
      componentList.remove(component);
    }
  }
  @Override
  public void print() {
    System.out.println(String.format("print %s(%s)", this.function, this.name));
    for (Component component : componentList) {
      component.print();
    }
  }
}
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public class WindowForm extends BaseComponent {
  public WindowForm(String name, String function) {
    super(name, function);
  }
}
public class Button extends BaseComponent {
  public Button(String name, String function) {
    super(name, function);
  }
}
public class Frame extends BaseComponent {
  public Frame(String name, String function) {
    super(name, function);
  }
}
public class CheckBox extends BaseComponent {
  public CheckBox(String name, String function) {
    super(name, function);
  }
}
//。。。其他的组件 textBox，label等
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public static void main(String[] args) {
    BaseComponent windowForm = new WindowForm("WINDOW窗口", "WinForm");
    windowForm.addComponent(new Picture("LOGO图片", "Picture"));
    windowForm.addComponent(new Button("登录", "Button"));
    windowForm.addComponent(new Button("注册", "Button"));
    BaseComponent frame = new Frame("FRAME1", "Frame");
    frame.addComponent(new Label("用户名", "Label"));
    frame.addComponent(new TextBox("文本框", "TextBox"));
    frame.addComponent(new Label("密码", "Label"));
    frame.addComponent(new PasswordBox("密码框", "TextBox"));
    frame.addComponent(new CheckBox("复选框", "CheckBox"));
    frame.addComponent(new TextBox("记住用户名", "TextBox"));
    frame.addComponent(new LinkLabel("忘记密码", "LinkLabel"));
    windowForm.addComponent(frameComp);
    windowForm.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 Label(用户名)
print TextBox(文本框)
print Label(密码)
print TextBox(密码框)
print CheckBox(复选框)
print TextBox(记住用户名)
print LinkLabel(忘记密码)
Process finished with exit code 0
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