jdk
1.官网下载JDK
地址: http://www.oracle.com/technetwork/articles/javase/index-jsp-138363.html
2. 解压缩,放到指定目录(以jdk-7u60-linux-x64.gz为例) 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.修改环境变量:
sudo vim ~/.bashrc 文件的末尾追加下面内容: #set oracle jdk environment export 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=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH 使环境变量马上生效 source ~/.bashrc
4.设置系统默认jdk 版本
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 若是初次安装jdk,会有下面的提示 There is only one alternative in link group java (providing /usr/bin/java): /usr/lib/jvm/jdk1.7.0_60/bin/java
否者,选择合适的jdk
5.测试jdk 复制代码
java -version java version "1.7.0_60" Java(TM) SE Runtime Environment (build 1.7.0_60-b19) Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
jdk.txt · 最后更改: 2019/05/28 17:34 由 螃蟹