|
1. 配置新JDK路径
vi /etc/profile 添加 export JAVA_HOME=/opt/java/jdk export JRE_HOME=/opt/java/jdk/jre export PATH=$PATH:$JAVA_HOME/bin export CLASSPATH=$JAVA_HOME/lib 2.使JDK配置生效
source /etc/profile 3.查看JAVA版本，此时JDK版本为1.5，而实际安装的是JDK1.6版本
[root@localhost ~]# java -version java version "1.5.0" gij (GNU libgcj) version 4.4.7 20120313 (Red Hat 4.4.7-4) Copyright (C) 2007 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. 4.查看java路径
[root@localhost ~]# which java /usr/bin/java 5.基本可以判断安装了默认的jdk环境
[root@localhost ~]# rpm -qa|grep java java_cup-0.10k-5.el6.x86_64 gcc-java-4.4.7-4.el6.x86_64 java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64 6.卸载默认jdk
[root@localhost ~]# yum remove java Loaded plugins: fastestmirror Setting up Remove Process Resolving Dependencies 7.再次获取JAVA信息，卸载完JAVA后，需要执行source /etc/profile 使环境变量生效。
[root@localhost ~]# java -version -bash: /usr/bin/java: No such file or directory [root@localhost ~]# source /etc/profile [root@localhost ~]# java -version java version "1.6.0_43" Java(TM) SE Runtime Environment (build 1.6.0_43-b01) Java HotSpot(TM) 64-Bit Server VM (build 20.14-b01, mixed mode) 至此，JAVA环境更新完成，此时的JDK版本为1.6.0_43
|
|
|
