hashmap arraylist和linkedlist,arraylist和hashmap扩容机制

按照hashmap中的key为name字段排序：

private void descSort(final String order,String dir){ Collections.sort(arrayList, new Comparator<HashMap<String,Object>>(){ @Override public int compare(HashMap<String, Object> arg0,HashMap<String, Object> arg1) { return ((String) arg1.get("name")).compareTo((String) arg0.get("name")); } }); }

转自：点击打开链接