linux安装java

linux安装java

centos删除自带的：

rpm -e --nodeps `rpm -qa | grep java`

java -version

查询不到版本就对了！

开始安装

mkdir -p /home/ufo/java/
cd /home/ufo/java/

下载jdk-8u181-linux-x64.tar.gz 解压,我放在 /home/ufo/java/jdk1.8.0_181

tar zxvf jdk-8u181-linux-x64.tar.gz

修改/etc/profile：

vim /etc/profile

export JAVA_HOME=/home/ufo/java/jdk1.8.0_181
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

source /etc/profile

ln -s /home/ufo/java/jdk1.8.0_181/bin/java /usr/bin/java

java -version