以下Java语句中，String str = “123456789”;str =str.subString(2,4);执行后str中的值为:

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='57125' and id < 3618504 and id<>'3618504' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='57125' and id > 3618504 and id<>'3618504' order by id asc limit 5