軟體設計模式————(組合模式)

财神给你送元宝發表於2024-11-21

[實驗任務一]:組合模式

用透明組合模式實現教材中的“資料夾瀏覽”這個例子。

實驗要求:

1.檔案的執行不需真正實現,只需簡單提示即可;(類圖)

2.提交原始碼;

public abstract class AbstractFile {
 
    public abstract void add(AbstractFile ele);
    public abstract void remove(AbstractFile ele);
    public abstract void display();
 
}
 
 
import java.util.ArrayList;
 
public class Folder extends AbstractFile{
 
    private String filename;
    private ArrayList al=new ArrayList<>();
    
 
    public Folder(String f) {
        filename=f;
    }
    @Override
    public void add(AbstractFile ele) {
        // TODO Auto-generated method stub
        al.add(ele);
        System.out.println("Folder add");
    }
 
    @Override
    public void remove(AbstractFile ele) {
        // TODO Auto-generated method stub
        al.remove(ele);
        System.out.println("Folder remove");
    }
 
    @Override
    public void display() {
        // TODO Auto-generated method stub
        for(Object object:al)
        {
            ((AbstractFile)object).display();
        }
        System.out.println("Folder:display");
 
    }
 
}
 
 
public class ImageFile extends AbstractFile{
 
    private String filename;
    
    public ImageFile(String f) {
        filename=f;
    }
    @Override
    public void add(AbstractFile ele) {
        // TODO Auto-generated method stub
        System.out.println("新增Image檔案");
    }
 
    @Override
    public void remove(AbstractFile ele) {
        // TODO Auto-generated method stub
        System.out.println("刪除Image檔案");
    }
 
    @Override
    public void display() {
        // TODO Auto-generated method stub
        System.out.println("展示Image檔案"+filename);
    }
 
}
 
 
public class TextFile extends AbstractFile{
 
    private String filename;
    
    public TextFile(String f) {
        filename=f;
    }
    @Override
    public void add(AbstractFile ele) {
        // TODO Auto-generated method stub
        System.out.println("新增Text檔案");
    }
 
    @Override
    public void remove(AbstractFile ele) {
        // TODO Auto-generated method stub
        System.out.println("刪除Text檔案");
    }
 
    @Override
    public void display() {
        // TODO Auto-generated method stub
        System.out.println("展示Text檔案"+filename);
    }
 
}
 
 
 
 
public class VideoFile extends AbstractFile{
 
    private String filename;
    
    public VideoFile(String f) {
        filename=f;
    }
    @Override
    public void add(AbstractFile ele) {
        // TODO Auto-generated method stub
        System.out.println("新增Video檔案");
    }
 
    @Override
    public void remove(AbstractFile ele) {
        // TODO Auto-generated method stub
        System.out.println("刪除Video檔案");
    }
 
    @Override
    public void display() {
        // TODO Auto-generated method stub
        System.out.println("展示Video檔案"+filename);
    }
 
}
 
 
 
public class Client {
    public static void main(String a[])
    {
        AbstractFile obj1,obj2,obj3,obj4,obj5;
        Folder plate1,plate2,plate3;
        obj1=new ImageFile("aaa.png");
        obj2=new TextFile("bbb.txt");
        plate1=new Folder("ccc");
        plate1.add(obj1);
        plate1.add(obj2);
        
        obj3=new VideoFile("ddd.mp3");
        obj4=new VideoFile("eee.mp3");
        plate2=new Folder("fff");
        plate2.add(obj3);
        plate2.add(obj4);
        
        obj5=new ImageFile("ggg.jpg");
        plate3=new Folder("hhh");
        plate3.add(plate1);
        plate3.add(plate2);
        plate3.add(obj5);
        
        plate3.display();
  }
}

  

3.注意程式設計規範。

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