#安装JDK
$ mkdir /usr/local/java
$ cp /root/syslog/jdk-6u31-linux-x64.bin  ./
$ ./jdk-6u31-linux-x64.bin
#配置环境变量
$ vi /etc/profile	
#set java enviroment
JAVA_HOME=/usr/local/java/jdk1.6.0_31
JRE_HOME=/usr/local/java/jdk1.6.0_31/jre
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=$JAVA_HOME/lib/dt.jar:JAVA_HOME/lib/tools.jar
$ source /etc/profile
$ java -version