1.官网下载JDK
地址: Java SE - Downloads
2.解压缩,放到指定目录
创建目录:
sudo mkdir /usr/lib/jvm
加压缩到该目录:
sudo tar -zxvf jdk-7u60-linux-x64.gz -C /usr/lib/jvm
3.配置环境变量
sudo vim ~/.bashrc
文件的末尾追加下面内容:
#set oracle jdk environmentexport JAVA_HOME=/usr/lib/jvm/jdk1.7.0_60 ## 这里要注意目录要换成自己解压的jdk 目录export JRE_HOME=${JAVA_HOME}/jreexport CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/libexport PATH=${JAVA_HOME}/bin:$PATH使环境变量马上生效
source ~/.bashrc
4.设置系统默认JDK
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_60/bin/java 300 sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_60/bin/javac 300 sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7.0_60/bin/jar 300 sudo update-alternatives --install /usr/bin/javah javah /usr/lib/jvm/jdk1.7.0_60/bin/javah 300 sudo update-alternatives --install /usr/bin/javap javap /usr/lib/jvm/jdk1.7.0_60/bin/javap 300
然后执行:
sudo update-alternatives --config java
5. 测试jdk
java -version
