什么意思,没听懂,能不能把问题描述的在俱体点,]
是不是像这种
ArrayList a=new ArrayList();
String test="this is test";
a.add(test);//把它赋给ArrayList
String b=(String)a.get(0);//把它取出来
是不是像这种
ArrayList a=new ArrayList();
String test="this is test";
a.add(test);//把它赋给ArrayList
String b=(String)a.get(0);//把它取出来
String str="this is test";
aa.add(str);
System.out.println((String)aa.get(0));这样也行
String username = "pleonheart";
ArrayList arrayList = new ArrayList();
arrayList.add(username);
request.setAttribute("arrayList", arrayList);
request.getRequestDispatcher("xxx.jsp").forword(request, response);jsp :
ArrayList arrayList = null;
if (request.getAttribute("arrayList") != null)
arrayList = (ArrayList)request.getAttribute("arrayList");
//display elements in ArrayList
for (int i = 0, size = arrayList.size(); i < size; i++)
System.out.println("username : " + (String)arrayList.get(i));