架构师训练营 - 第 3 周课后作业（1 期）

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。

public class Component {



private String type;

private String desc;



private List<Component> subComponents;



public Component(String type, String desc) {

this.type = type;

this.desc = desc;

this.subComponents = new ArrayList<>();

}



public String getType() {

return type;

}



public void setType(String type) {

this.type = type;

}



public String getDesc() {

return desc;

}



public void setDesc(String desc) {

this.desc = desc;

}



public void add(Component e) {

subComponents.add(e);

}



public void remove(Component e) {

subComponents.remove(e);

}



public List<Component> getSubComponents() {

return subComponents;

}



@Override

public String toString() {

return type + "(" + desc + ")";

}

}



public class WindowMain {



public static void main(String[] args) {

Component wf = new Component("WinForm", "WINDOW窗口");



Component pct = new Component("Picture", "LOGO图片");

Component btn1 = new Component("Button", "登陆");

Component btn2 = new Component("Button", "注册");

wf.add(pct);

wf.add(btn1);

wf.add(btn2);

Component frame = new Component("Frame", "FRAME1");

Component lb1 = new Component("Lable", "用户名");

Component tbx1 = new Component("TextBox", "文本框");

Component lb2 = new Component("Lable", "密码");

Component pbx = new Component("PasswordBox", "密码框");

Component cbx = new Component("CheckBox", "复选框");

Component tbx2 = new Component("TextBox", "记住密码");

Component lklb = new Component("LinkLable", "忘记密码");

frame.add(lb1);

frame.add(tbx1);

frame.add(lb2);

frame.add(pbx);

frame.add(cbx);

frame.add(tbx2);

frame.add(lklb);



wf.add(frame);



System.out.println(wf);

for (Component cp : wf.getSubComponents()) {

System.out.println(cp);

for (Component scp : cp.getSubComponents()) {

System.out.println(scp);

}

}



}

}