架构师训练营 - 作业 - 第三讲

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吕浩
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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();
}

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();
}
}
}

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);
}
}

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();
}
}

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



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架构师训练营 - 作业 - 第三讲