centos6.3下安装jdk1.6u33

jdk1.6u33 安装
下载文件为.bin，先给权chmod u+x ./*.bin，然后放在/usr/lib/java/目录下运行。
配置环境变量，修改文件/etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/java/jdk1.6.0_33/bin:"
CLASSPATH=".:/usr/lib/java/jdk1.6.0_33/lib:"
JAVA_HOME="/usr/lib/java/jdk1.6.0_33"

或者在 /etc/profile 最后添加(相当于window下的path环境变量)
export JAVA_HOME=/usr/lib/java/jdk1.6.0_33
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/rt.jar

保存后，使配置生效
source /home/fuscent/.bashrc or source /root/.bashrc or source /etc/profile
替换系统自带JDK
sudo update-alternatives --install /usr/bin/java java /usr/lib/java/jdk1.6.0_33/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/java/jdk1.6.0_33/bin/javac 300
sudo update-alternatives --config java