centos7 安装oracle jdk8
①centos7 自带了open jdk7。所以这里首先移除自带的jdk:
yum remove java-1.7.0-openjdk
②安装oracle jdk:
cd /usr/local/jdk1.8.0_111
alternatives –install /usr/bin/java java /usr/local/jdk1.8.0_111/bin/java 2
alternatives –config java
(选择oracle jdk对应的数字)
alternatives –install /usr/bin/jar jar /usr/local/jdk1.8.0_111/bin/jar 2
alternatives –install /usr/bin/javac javac /usr/local/jdk1.8.0_111/bin/javac 2
alternatives –set jar /usr/local/jdk1.8.0_111/bin/jar
alternatives –set javac /usr/local/jdk1.8.0_111/bin/javac
③添加环境变量:
vim /etc/profile
export JAVA_HOME=/usr/local/jdk1.8.0_111
export PATH=PATH:JAVA_HOME/bin:$JAVA_HOME/jre/bin
ubuntu1604下安装jdk8
也可以跟上面一样,直接在/etc/profile下配置JAVA_HOME