Gson解析Json数据出现了异常

在用Gson解析如下Json的时候

String jsonStr = "{code:403,msg:无查询好友信息,result:[]}";
解析代码为：
Gson son = new Gson()；
MessageInfo info = son.fromJson(jsonStr, MessageInfo.class);
 System.out.println(info.getCode());
 System.out.println(info.getResult());
 System.out.println(info.getMsg());

MessageInfo.java
 private int code;
 private String msg;
 private Result result;

result为空的时候，就会出现异常
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 31

望大神帮下忙，解决下，这个怎么来解析