安装
以JDK1.6.0_43为例
下载jdk-6u43-linux-x64.bin，http://www.oracle.com/technetwork/java/javase/downloads/index.html
增加可执行权限 chmod +x jdk-6u43-linux-x64.bin，
执行 ./jdk-6u43-linux-x64.bin 生成目录jdk1.6.0_43
拷贝到/usr/share下，mv jdk1.6.0_43 /usr/share
另外，jdk-6u43-linux-x64.bin将所有文件解压缩到当前目录的jdk$verison_$update目录，
jdk-6u43-linux-x64-rpm.bin解压缩生成rpm包，用rpm -ivh命令安装
配置环境变量
在/etc/profile下增加
# set Java environment
JAVA_HOME=/usr/share/jdk1.6.0_43
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME
export PATH
export CLASSPATH
测试
[root@localhost ~]# echo $JAVA_HOME
/usr/share/jdk1.6.0_43
[root@localhost ~]# echo $PATH
/usr/share/jdk1.6.0_43/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
[root@localhost ~]# echo $CLASSPATH
.:/usr/share/jdk1.6.0_43/lib/dt.jar:/usr/share/jdk1.6.0_43/lib/tools.jar
[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)
