Linux 安装jdk 8

查看是否已经安装了jdk

rpm -qa | grep java

rpm -qa | grep jdk

卸载已经安装的jdk

rpm -e --nodeps <包的名称>

安装

rpm -ivh jdk-8u5-linux-x64.rpm --prefix=/usr/local/java

设置环境变量

vi /etc/profile

在底部添加

export JAVA_HOME=/usr/local/java/jdk1.8.0_05

export CLASS_PATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$PATH:$JAVA_HOME/bin

使环境变量生效

source /etc/profile

查看是否安装成功

java -version

java version "1.8.0_05"

Java(TM) SE Runtime Environment (build 1.8.0_05-b13)

Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

成功!