public class StdResponse extends CommonResponse{

    private int claimsMatched;
    private String employeeId;
    private List<StdDetails> stdDetails;

}

public class StdDetails {

    private String claimId;
    private String type;
    private String startDate;
    private String endDate;
    private String reportedDate;
    private String hrStatus;

}

我有一个stdresponse对象“response”。现在我想用startdate对这个响应对象进行排序，startdate是stddetails列表中的一个。我想用比较器。。。。

Comparator<StdResponse> cmp = new Comparator<StdResponse>() {

            public int compare(List<StdResponse> o1, <StdResponse> o2) {
                return o1.getStdDetails().

无法获取startdate的值。请帮忙，谢谢