周练习 3

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发布于: 2020 年 10 月 04 日
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。
﻿
component :
package com.test;
import java.util.List;
public abstract class Component {
    public abstract void addChild(Component component);
    public abstract void removeChild(Component component);
    public abstract List<Component> getChildList();// only for this practice
    // operation work
    public void operation(){
        List<Component> childs = this.getChildList();
        if (null != childs && !childs.isEmpty()) {
            for (Component child : childs) {
                child.operation();
            }
        }
    }
}
window form : 
package com.test;
import java.util.ArrayList;
import java.util.List;
public class WindowForm extends Component{
    private List<Component> childList = new ArrayList<>();
    @Override
    public void addChild(Component component) {
        this.childList.add(component);
    }
    @Override
    public void removeChild(Component component) {
        this.childList.remove(component);
    }
    @Override
    public List<Component> getChildList(){
        return this.childList;
    }
    @Override
    public void operation() {
        System.out.println("print WinForm(WINDOW窗口)");
        super.operation();
    }
}
﻿
Picture:
package com.test;
import java.util.List;
public class Picture extends Component{
    @Override
    public void addChild(Component component) {
    }
    @Override
    public void removeChild(Component component) {
    }
    @Override
    public List<Component> getChildList(){
        return null;
    }
    @Override
    public void operation() {
        System.out.println("print Picture(LOGO图片)");
    }
}
Button :
package com.test;
import java.util.List;
public class Button extends Component{
    private String name;
    @Override
    public void addChild(Component component) {
    }
    @Override
    public void removeChild(Component component) {
    }
    @Override
    public List<Component> getChildList() {
        return null;
    }
    @Override
    public void operation() {
        System.out.println(String.format("print Button(%s)", this.getName()));
    }
    public Button(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}
﻿
组件Lable,TextBox,CheckBox和LinkLable代码与Button类似,基本都是改了名字,这里不再赘述;
﻿
Client :
package com.test;
public class Client {
    public static void main(String[] args) {
        WindowForm windowForm = new WindowForm();
        // deep 1
        Picture picture = new Picture();
        Button loginButton = new Button("登录");
        Button registerButton = new Button("注册");
        Frame frame = new Frame("FRAME1");
        windowForm.addChild(picture);
        windowForm.addChild(loginButton);
        windowForm.addChild(registerButton);
        windowForm.addChild(frame);
        // deep 2
        Lable userNameLable = new Lable("用户名");
        TextBox textBox = new TextBox("文本框");
        Lable passwordLable = new Lable("密码");
        PasswordBox passwordBox = new PasswordBox("密码框");
        CheckBox checkBox = new CheckBox("复选框");
        TextBox rememberUser = new TextBox("记住用户名");
        LinkLable linkLable = new LinkLable("忘记密码");
        frame.addChild(userNameLable);
        frame.addChild(textBox);
        frame.addChild(passwordLable);
        frame.addChild(checkBox);
        frame.addChild(rememberUser);
        frame.addChild(linkLable);
        // finish
        windowForm.operation();
    }
}
﻿
输出结果:
﻿
发布于: 2020 年 10 月 04 日阅读数: 16
何毅曦

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