Ubuntu 16.04安裝Java 8

Ubuntu 16.04安裝Java 8

 

1 Java 8 下載地址

https://www.oracle.com/technetwork/cn/java/javase/downloads/index.html

2 以root用戶登陸將下載的jdk-8u92-linux-x64.tar.gz文件放到/temp目錄下，使用以下命令解壓

tar zxvf jdk-8u211-linux-x64.tar.gz

3 將解壓後的jdk1.8.0_211複製到/opt下，命令以下：

root@test:~# mkdir /temp
root@test:~# cd /temp
root@test:/temp# tar zxvf jdk-8u211-linux-x64.tar.gz
root@test:/temp# cd /opt
root@test:/opt# mv /temp/jdk1.8.0_211/ .
root@test:/opt# ls -l
總用量 4
drwxr-xr-x 8 uucp 143 4096 4月 1 12:20 jdk1.8.0_211

4 在/usr/bin目錄下建立java軟連接

root@test:/opt# cd /usr/bin
root@test:/bin# ln -s /opt/jdk1.8.0_211/bin/java java

   驗證軟件接的正確性

root@test:/bin# java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b14, mixed mode)

5 設置Java環境

root@test:/usr/bin# vim /etc/profile
export JAVA_HOME=/opt/jdk1.8.0_211
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
root@test:/bin# source /etc/profile
root@test:/bin# echo $JAVA_HOME
/opt/java1.8.0_211

6 切換到其它用戶驗證

ccskun@test:~$ echo $JAVA_HOME
/opt/jdk1.8.0_211
ccskun@test:~$ java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b14, mixed mode)