作业 - 组合模式和单例模式

package com.study;
public class Main {
    public static void main(String[] args) {
	// write your code here
        System.out.println("BEGIN DRAWING!");
        UIElement rootnode=new UINode("WinForm","windown 窗口");
        UIElement picture=new UILeaf("Picture","LOGO 图片");
        UIElement button1=new UILeaf("Button","注册");
        UIElement button2=new UILeaf("Button","登录");
        rootnode.add(picture);
        rootnode.add(button1);
        rootnode.add(button2);
        UIElement frame=new UINode("Frame","Frame1");
        UIElement lable1=new UILeaf("Lable","用户名");
        UIElement textbox1=new UILeaf("TextBox","文本框");
        UIElement lable2=new UILeaf("Lable","密码");
        UIElement passwdbox=new UILeaf("PasswdBox","密码框");
        UIElement checkbox=new UILeaf("CheckBox","复选框");
        UIElement textbox2=new UILeaf("TextBox","记住用户名");
        UIElement linklable=new UILeaf("LinkLable","忘记密码");
        frame.add(lable1);
        frame.add(textbox1);
        frame.add(lable2);
        frame.add(passwdbox);
        frame.add(checkbox);
        frame.add(textbox2);
        frame.add(linklable);
        rootnode.add(frame);
        rootnode.draw(1);
        System.out.println("END DRAWING!");
    }
}

package com.study;
public interface UIElement {
     public void draw(int depth);
     public void add(UIElement e);
}

package com.study;
import java.util.ArrayList;
public class UINode  implements UIElement {
    private String strNodeType;
    private String strNodeName;
    private ArrayList<UIElement> uiElementList=new ArrayList<UIElement>();
    public UINode(String strNodeType,String strNodeName)
    {
        this.strNodeType=strNodeType;
        this.strNodeName=strNodeName;
    }
    public void add(UIElement uiElement)
    {
        this.uiElementList.add(uiElement);
    }
    public void remove(UIElement uiElement)
    {
        this.uiElementList.remove(uiElement);
    }
    @Override
    public void draw(int depth) {
        for(int i=0;i<depth;i++)
        {
            System.out.print("-");
        }
        System.out.println("【Node】:"+this.strNodeType+" "+this.strNodeName);
        for(UIElement uiElement:uiElementList)
        {
            uiElement.draw(depth+1);
        }
    }
}

package com.study;
public class UILeaf implements UIElement {
    private String strLeafType;
    private String strLeafName;
    public UILeaf(String strLeafType, String strLeafName)
    {
        this.strLeafType=strLeafType;
        this.strLeafName=strLeafName;
    }
    @Override
    public void draw(int depth) {
        for(int i=0;i<depth;i++)
        {
            System.out.print("-");
        }
        System.out.println("【Leaf】:"+this.strLeafType+" "+this.strLeafName);
    }
    @Override
    public void add(UIElement e) {
    }
}