1 void testArrayList(){
2 String []appname ={"联系人","相机","电话","收音机","手电筒","更多"};
3 String s_appname = null;
4 List<Map<String, Object>> gv_applist = new ArrayList<Map<String,Object>>();
5 for(int i=0; i<appname.length;i++) {
6
7 s_appname = appname[i];
8 Map<String, Object> map = new HashMap<String, Object>();
9 map.put("appname", s_appname);
10 gv_applist.add(map);
11 }
12
13
14 List<Map<String, Object>> templist1 = new ArrayList<Map<String, Object>>();
15 templist1 = gv_applist.subList(0, 4);
16 System.out.println(templist1.size());//输出4
17 // gv_applist.remove(2);
18 templist1.size();//报错 java.util.ConcurrentModificationException
19
20
21 List<Map<String, Object>> templist2 = new ArrayList<Map<String, Object>>(gv_applist.subList(0, 4));
22 System.out.println(templist2.size());//输出4
23 gv_applist.remove(2);
24 System.out.println(templist2.size());//输出4,这种方式子链表不受母链表影响，母链表可以任意操作
25
26 templist2.remove(2);
27 System.out.println(templist2.size());//输出3
28
29
30 }
