Exception in thread "main" com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 4 column 6 path $.major[0]

把JavaBean中的string改成list之后,打印如下语句

System.out.println(wangxiaoer.getMajor());

System.out.println(wangxiaoer.getMajor().getClass());

的时候出现以上异常,请问大佬怎么解决