jdk1.7安装之后切换不回去

[size=x-large][b]错误现象：[/b][/size]
[size=large]在win7上安装过jdk1.7之后，然后把环境变量切换回jdk1.6之后，在命令行运行java -version依然显示jdk1.7。[/size]
[img]http://dl2.iteye.com/upload/attachment/0112/7785/440cfe26-687a-3884-ac2f-24cd514984c0.png[/img]
[img]http://dl2.iteye.com/upload/attachment/0112/7787/0c83f266-076f-3ce4-b5a3-5c42da0958c2.png[/img]

[size=x-large][b]解决办法：[/b][/size]
[size=large]原因是jdk1.7安装时候在C:\Windows\System32目录下创建了java.exe、javaw.exe、javaws.exe，将这几个文件删除就可以了。[/size]

C:\Users\qihuiyong>java -version
java version "1.7.0_67"
Java(TM) SE Runtime Environment (build 1.7.0_67-b01)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)

第二次运行：
C:\Users\qihuiyong>java -version
java version "1.6.0_38"
Java(TM) SE Runtime Environment (build 1.6.0_38-b05)
Java HotSpot(TM) 64-Bit Server VM (build 20.13-b02, mixed mode)