linux 安装jdk

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安装JDK

下载并解压jdk-8u91-linux-x64.tar.gz到/opt

执行：

alternatives --install /usr/bin/java java /opt/jdk1.8.0_91/bin/java 2
alternatives --config java

alternatives --install /usr/bin/jar jar /opt/jdk1.8.0_91/bin/jar 2
alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_91/bin/javac 2
alternatives --set jar /opt/jdk1.8.0_91/bin/jar
alternatives --set javac /opt/jdk1.8.0_91/bin/javac
~/.bashrc 中增加：

export JAVA_HOME=/opt/jdk1.8.0_91
export JRE_HOME=/opt/jdk1.8.0_91/jre
export PATH=$PATH:/opt/jdk1.8.0_91/bin:/opt/jdk1.8.0_91/jre/bi

linux 安装jdk

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原文地址：http://www.cnblogs.com/yiguangchao9999/p/5630815.html