linux/centos下安装如何安装jdk

tar zxvf jdk.tar.gz //解压

vim /etc/profile //编辑该文件, 修改环境变量.

export JAVA_HOME=/usr/local/jdk1.X
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH

java -version