centos7 查看java-v 报错

[root@localhost ~]# java -v
Unrecognized option: -v
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

jdk1.7 查看版本号可以通过 java -Vand java --version 查看，
而jdk1.8 就得通过 java -version来查看版本号