week3- 作业

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。

  1. 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

IComponent

public interface IComponent {
void print();
}

public class Component implements IComponent {
protected String name;
public Component(String name) {
this.name = name;
}
@Override
public void print() {
System.out.println("组件 " + name);
}
}

public abstract class Container extends Component {
public Container(String name) {
super(name);
}
List<Component> components = new ArrayList<>();
public void add(Component component) {
components.add(component);
}
@Override
public void print() {
System.out.println("容器 " + name);
for (Component component : components) {
component.print();
}
}
}

各容器实现

public class WinForm extends Container{
public WinForm(String name) {
super(name);
}
}
public class Frame extends Container{
public Frame(String name) {
super(name);
}
}

各组件实现

public class Button extends Component {
public Button(String name) {
super(name);
}
}
public class CheckBox extends Component {
public CheckBox(String name) {
super(name);
}
}
public class Label extends Component {
public Label(String name) {
super(name);
}
}
public class LinkLabel extends Component {
public LinkLabel(String name) {
super(name);
}
}
public class PasswordBox extends Component {
public PasswordBox(String name) {
super(name);
}
}
public class Picture extends Component {
public Picture(String name) {
super(name);
}
}
public class TextBox extends Component {
public TextBox(String name) {
super(name);
}
}

测试实现

public class Test {
public static void main(String[] args) {
WinForm winForm = new WinForm("WINDOW窗体");
Component picture = new Picture("LOGO图片");
Component login = new Picture("登录");
Component reg = new Button("注册");
winForm.add(picture);
winForm.add(login);
winForm.add(reg);
Frame frame = new Frame("FRAME1");
frame.add(new Label("用户名"));
frame.add(new TextBox("文本框"));
frame.add(new Label("密码"));
frame.add(new PasswordBox("密码框"));
frame.add(new CheckBox("复选框"));
frame.add(new TextBox("记住用户名"));
frame.add(new LinkLabel("忘记密码"));
winForm.add(frame);
winForm.print();
}
}

运行结果

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week3- 作业