小编see*_*gan的帖子

<s:select
  name="PenaltyPercentage"
  id="PenaltyPercentageId"
  list="#{'7.5%':'7.5%', '15.0%':'15.0%'}" <!-- shows error in this line -->
  headerKey=""
  headerValue="Please Select"
  emptyOption="false">
</s:select>

错误消息如下所示

Encountered ":" at line 1, column 9.
Was expecting one of:
"}" ...
"." ...
"]" ...
">" ...
"<" ...

我正在尝试从orElse / orElseGet流运算符返回HashMap，但似乎无法在这些运算符中使用HashMap。

public class Main {
    public static void main(String args[]) {

        List<String> names = new ArrayList<String>() {{
            add("test1");
        }};

        HashMap<Integer, String> indexToNameMap = names.stream()
                .filter(name -> name.equals("test"))
                .map(name -> new HashMap<Integer, String>() {{
                    put(names.indexOf(name), name);
                }})
                .findFirst()
                .orElseGet(() -> new HashMap<Integer, String>() {{
                    put(0, "UN_AVAILABLE");
                }});
    }
}

错误：

Bad return type in lambda expression: HashMap<Integer, String> cannot be converted to HashMap<Integer, String>

如何解决这个问题？