TreeMap中不正確排序在這種情況下

Question

序列語句複製HashMap到TreeMap

private Map<String,Bitmap> imageFilexx= new HashMap<String,Bitmap>(); 

//Assuming map has values 
printMap(imageFilexx); 
TreeMap<String,Bitmap> imageFilexxS; 
imageFilexxS= new TreeMap<String,Bitmap>(imageFilexx); 
printMap(imageFilexxS); 

功能，顯示此地圖：

public static void printMap(Map<String, Bitmap> map) { 
     for (Map.Entry entry : map.entrySet()) { 
      System.out.println("Key : " + entry.getKey()); 
     } 
    } 

輸入：

Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p7.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p1.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p5.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p3.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p11.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p9.png 

當前O/P：

Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p1.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p11.png //11 should be displayed in the last 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p3.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p5.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p7.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p9.png 

預期O/P：

Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p1.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p3.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p5.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p7.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p9.png 
Key : http://myserver.com/myfolder/ImageDesc/ImageDesc%20p11.png 

Answer 1

據字典順序排序（在default排序方法）。

您必須定義您自己的natural sort order的實現。 TreeMap的構造函數允許您傳入自定義比較器。