小编Rut*_*jaG的帖子

请看一下我的代码：

Object longL = 2548214;
Map<String, Object> map = new HashMap<String, Object>(1);
map.put("LongNumber", longL);
List<Map<String, Object>> returnlist = new ArrayList(10);
returnlist.add(map);

List<Object> versionMap1 = new ArrayList(10);
versionMap1.add(returnlist);

List<Map<String, String>> docIdVersionNameMap = new ArrayList<>();
docIdVersionNameMap.addAll((List<Map<String, String>>)versionMap1.get(0));

Map<String, String> versionDoc=docIdVersionNameMap.get(0);

Map<String,String> versionDocInfo=new HashMap<String,String>(1);
versionDocInfo.put(versionDoc.get("LongNumber"),"abc");
System.out.println(versionDocInfo.toString());

在Java_1.8_60（编译并运行）中，此代码运行良好，但是在Java 11中编译并运行时，它将引发以下异常：

Exception in thread "main" java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.String (java.lang.Integer and java.lang.String are in module java.base of l
oader 'bootstrap')
        at teststringandlong.Trial.main(Trial.java:35)

Java 11中有关HashMap的变化吗？