ubuntu 安裝jdk 1.8

ubuntu 安裝jdk 1.8

安裝環境

阿里雲服務器: ubuntu 14.04

root@iZwz9g4mn7pyh8u5niic86Z:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.4 LTS
Release:        14.04
Codename:       trusty
root@iZwz9g4mn7pyh8u5niic86Z:~# 

下載jdk1.8

oracle 提供的jdk1.8 有不同的版本，32位 64位，Solaris ,arms系列等 Linux
注意你選擇的需要的jdk版本。如果選錯版本，將會導致回去的安裝失敗。這裏應該使用的是Linux X64

如何查看linux的平臺版本

root@iZwz9g4mn7pyh8u5niic86Z:~# uname -m
x86_64
root@iZwz9g4mn7pyh8u5niic86Z:~# 

安裝過程

root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo mkdir /usr/java
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo tar zxvf jdk-8u111-linux-x64.tar.gz  -C /usr/java

//添加環境變量
root@iZwz9g4mn7pyh8u5niic86Z:~/sudo vi ~/.bashrc
//在文檔末尾添加如下代碼：
    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 300
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/javac javac /usr/java/jdk1.8.0_111/bin/javac 300
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/jar jar /usr/java/jdk1.8.0_111/bin/jar 300
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --install /usr/bin/javah javah /usr/java/jdk1.8.0_111/bin/javah 300
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 

// 這裏注意usr/java/jdk1.8.0_111 是我解壓自己的文件夾

root@iZwz9g4mn7pyh8u5niic86Z:~/download# sudo update-alternatives --config java
There is only one alternative in link group java (providing /usr/bin/java): /usr/java/jdk1.8.0_111/bin/java
Nothing to configure.
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# 
root@iZwz9g4mn7pyh8u5niic86Z:~/download# java -version
java 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# 

結束