Red Hat5.5安裝JAVA（JDK）顯示的版本不對

[root@Linux9 jdk1.8]# java -version

java version "1.4.2"

gij (GNU libgcj) version 4.1.2 20080704 (Red Hat 4.1.2-48)

Copyright (C) 2006 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

原因:檢查有舊版本的jdk,造成版本沖突

[root@Linux9 jdk1.8]# rpm -qa|grep gcj

java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

libgcj-4.1.2-48.el5

注：centos 中如果版本不對，就用yum 查：

        [root@Linux9 jdk1.8]# yum list|grep jdk

       發現“@”安裝的版本用yum remove全解除安裝掉