ubuntu 安装jdk 1.8

安装环境

阿里云服务器: ubuntu 14.04

root@iZwz9g4mn7pyh8u5niic86Z:~# lsb_release -aNo LSB modules are available.Distributor ID: UbuntuDescription:    Ubuntu 14.04.4 LTSRelease:        14.04Codename:       trustyroot@iZwz9g4mn7pyh8u5niic86Z:~# 

下载jdk1.8

oracle 提供的jdk1.8 有不同的版本，32位 64位，Solaris ,arms系列等 Linux
注意你选择的需要的jdk版本。如果选错版本，将会导致回去的安装失败。这里应该使用的是Linux X64

如何查看linux的平台版本

root@iZwz9g4mn7pyh8u5niic86Z:~# uname -mx86_64root@iZwz9g4mn7pyh8u5niic86Z:~# 

安装过程

root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo mkdir /usr/javaroot@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo tar zxvf jdk-8u111-linux-x64.tar.gz  -C /usr/java//添加环境变量root@iZwz9g4mn7pyh8u5niic86Z:~/sudo vi ~/.bashrc//在文档末尾添加如下代码：    export JAVA_HOME=/usr/java     export JRE_HOME=${JAVA_HOME}/jre      export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib      export PATH=${JAVA_HOME}/bin:$PATH root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/java java /usr/java/jdk1.8.0_111/bin/java 300root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/javac javac /usr/java/jdk1.8.0_111/bin/javac 300root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/jar jar /usr/java/jdk1.8.0_111/bin/jar 300root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/javah javah /usr/java/jdk1.8.0_111/bin/javah 300root@iZwz9g4mn7pyh8u5niic86Z:~/download# // 这里注意usr/java/jdk1.8.0_111 是我解压自己的文件夹root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --config javaThere is only one alternative in link group java (providing /usr/bin/java): /usr/java/jdk1.8.0_111/bin/javaNothing to configure.root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# root@iZwz9g4mn7pyh8u5niic86Z:~/download# java -versionjava version "1.8.0_111"Java(TM) SE Runtime Environment (build 1.8.0_111-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)root@iZwz9g4mn7pyh8u5niic86Z:~/download# 

结束