【求助】如何安装java环境?

[root@localhost download]# java -version
libgcj-java-placeholder.sh

This script is a placeholder for the /usr/bin/java
master link required by jpackage.org conventions.  libgcj's
rmiregistry, rmic and jar tools are now slave symlinks to these
masters, and are managed by the alternatives(8) system.

This change was necessary because the rmiregistry, rmic and jar tools
installed by previous versions of libgcj conflicted with symlinks
installed by jpackage.org JVM packages.
gij (GNU libgcj) version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)

Copyright (C) 2002 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.

请问以上表示什么意思?!怎么解决?!　　　　　　

直接去sun的网站下个java，照说明安装就是了。