架构师训练营第三周命题作业

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发布于: 2020 年 06 月 24 日
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。
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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  定义抽象类WindowsNode，包含type和name两个属性和printNode抽象方法，用来表示抽象的窗口结点。
package composite;
public abstract class WindowsNode {
    private String type;
    private String name;
    public WindowsNode(String type, String name) {
        this.type = type;
        this.name = name;
    }
    public String getType() {
        return type;
    }
    public String getName() {
        return name;
    }
    public abstract void printNode();
}
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WindowsWidget类继承了WindowsNode类，重写了printNode方法，用来表示具体的最小窗口对象。
package composite;
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public class WindowsWidget extends WindowsNode {
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    public WindowsWidget(String type, String name) {
        super(type, name);
    }
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    @Override
    public void printNode() {
        System.out.println(this.getType() + ":" + this.getName());
    }
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}
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WindowsWidget类继承了WindowsNode类，重写了printNode方法，新增了WindowsNodes属性和addSubNode方法，用来表示一组窗口对象。mian函数用来对整个组合模式的程序进行测试。
package composite;
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import java.util.ArrayList;
import java.util.List;
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public class WindowsComponents extends WindowsNode {
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    private List<WindowsNode> WindowsNodes = new ArrayList<>();
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    public WindowsComponents(String type, String name) {
        super(type, name);
    }
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    public void addSubNode(WindowsNode windowsNode) {
        WindowsNodes.add(windowsNode);
    }
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    @Override
    public void printNode() {
        System.out.println(this.getType() + ":" + this.getName());
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        for (WindowsNode windowsNode : WindowsNodes) {
            windowsNode.printNode();
        }
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    }
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    public static void main(String[] args) {
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        WindowsComponents winForm = new WindowsComponents("WinForm", "WINDOW窗口");
        WindowsWidget picture = new WindowsWidget("Picture", "LOGO图片");
        WindowsWidget loginButton = new WindowsWidget("Button", "登录");
        WindowsWidget registerButton = new WindowsWidget("Button", "注册");
        WindowsComponents frame = new WindowsComponents("Frame", "FRAME1");
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        winForm.addSubNode(picture);
        winForm.addSubNode(loginButton);
        winForm.addSubNode(registerButton);
        winForm.addSubNode(frame);
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        WindowsWidget userLable = new WindowsWidget("Lable", "用户名");
        WindowsWidget userTextBox = new WindowsWidget("TextBox", "文本框");
        WindowsWidget pwdLable = new WindowsWidget("Lable", "密码");
        WindowsWidget pwdBox = new WindowsWidget("PasswordBox", "密码框");
        WindowsWidget checkBox = new WindowsWidget("CheckBox", "复选框");
        WindowsWidget rememberTextBox = new WindowsWidget("TextBox", "记住用户名");
        WindowsWidget forgetPwdLable = new WindowsWidget("LinkLable", "忘记密码");
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        frame.addSubNode(userLable);
        frame.addSubNode(userTextBox);
        frame.addSubNode(pwdLable);
        frame.addSubNode(pwdBox);
        frame.addSubNode(checkBox);
        frame.addSubNode(rememberTextBox);
        frame.addSubNode(forgetPwdLable);
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        winForm.printNode();
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    }
}
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运行main函数，打印结果如下：
WinForm:WINDOW窗口
Picture:LOGO图片
Button:登录
Button:注册
Frame:FRAME1
Lable:用户名
TextBox:文本框
Lable:密码
PasswordBox:密码框
CheckBox:复选框
TextBox:记住用户名
LinkLable:忘记密码
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发布于: 2020 年 06 月 24 日阅读数: 30
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