Ubuntu 16.04安装Java 8

Posted 2020-07-13 ccskun

1 Java 8 下载地址

http://www.oracle.com/technetwork/cn/java/javase/downloads/jdk8-downloads-2133151-zhs.html

2 以root用户登录将下载的jdk-8u92-linux-x64.tar.gz文件放到/temp目录下，使用如下命令解压

tar zxvf jdk-8u92-linux-x64.tar.gz

3 将解压后的jdk1.8.0_92复制到/opt下，命令如下：

[email protected]:~# mkdir /temp
[email protected]:~# cd /temp
[email protected]:/temp# tar zxvf jdk-8u92-linux-x64.tar.gz
[email protected]:/temp# cd /opt
[email protected]:/opt# mv /temp/jdk1.8.0_92/ .
[email protected]:/opt# ls -l
总用量 4
drwxr-xr-x 8 uucp 143 4096 4月 1 12:20 jdk1.8.0_92

4 在/bin目录下创建java软链接

[email protected]:/opt# cd /bin
[email protected]:/bin# ln -s /opt/jdk1.8.0_92/bin/java java

   验证软件接的正确性

[email protected]:/bin# java -version
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

5 设置Java环境

[email protected]:/bin# gedit /etc/profile
export JAVA_HOME=/opt/java1.8.0_92
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH={JAVA_HOME}/bin:$PATH
[email protected]:/bin# source /etc/profile
[email protected]:/bin# echo $JAVA_HOME
/opt/java1.8.0_92

6 切换到其它用户验证

[email protected]:~$ echo $JAVA_HOME
/opt/java1.8.0_92
[email protected]:~$ java -version
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)