I was trying to replace map details of only selected index from list of bean but it replaced all the value for each list objects which contains the same key. If I am creating new object of map before going to put new value then it's working fine, but I wanted to know the reason why following code misbehave.
public static void main(String[] args) {
List<PolicyAddlnInsuredBean> lst = new ArrayList<PolicyAddlnInsuredBean>();
PolicyAddlnInsuredBean pb = new PolicyAddlnInsuredBean();
Map<String, Map<String, Object>> epInfoMap = new HashMap<String, Map<String,Object>>();
Map<String,Object> map = new HashMap<String, Object>();
map.put("addtlnInsReqd", "YES");
map.put("selectedFlg", "No");
epInfoMap.put("AL", map);
pb.setEpInfoMap(epInfoMap);
lst.add(pb);
epInfoMap = new HashMap<String, Map<String,Object>>();
map = new HashMap<String, Object>();
map.put("addtlnInsReqd", "YES");
map.put("selectedFlg", "No");
epInfoMap.put("AL", map);
pb.setEpInfoMap(epInfoMap);
lst.add(pb);
lst.get(0).getEpInfoMap().get("AL").put("selectedFlg", "Yes");
System.out.println(lst);
}
My Pojo class :
public class PolicyAddlnInsuredBean{
private Map<String,Map<String,Object>> epInfoMap =new HashMap<String, Map<String,Object>>();
public Map<String, Map<String, Object>> getEpInfoMap() {
return epInfoMap;
}
public void setEpInfoMap(Map<String, Map<String, Object>> epInfoMap) {
this.epInfoMap = epInfoMap;
}
@Override
public String toString() {
return "PolicyAddlnInsuredBean [epInfoMap=" + epInfoMap + "]";
}
}
只有一个pb
对象,两次添加到lst
(原理:“检查new
s”)。
相同的pb对象被添加到列表中两次。因此即使在第0个索引处更改pb对象时,更改也将反映在第一个索引处的对象上。
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