Deepin - 安裝jdk（卸載openjdk）

一、卸載openjdk

1. 查看openjdk版本

# nangy @ nangy-vm in ~ [22:07:46] 
$ java -version
zsh: command not found: java

# nangy @ nangy-vm in ~ [22:09:22] C:127
$ dpkg -l | grep openjdk

2. 卸載openjdk

# 本機沒有，那就不用卸載，直接安裝jdk
# 如果你的系統有，則執行卸載
sudo apt-get remove openjdk*

二、下載jdk1.8

官網下載 | JDK 8u211

三、安裝jdk1.8

方法一、手動配置

1. 準備jdk文件

先下載.tar.gz壓縮包

# nangy @ nangy-vm in ~ [22:09:35] C:1
$ cp /mnt/hgfs/VMware共享文件/software/jdk-8u211-linux-x64.tar.gz -R /home/nangy/Downloads 

# 以下操作切換成root用戶
# nangy @ nangy-vm in ~ [22:16:31] 
$ su

# root @ nangy-vm in /home/nangy [22:18:46] 
$ cd /usr/local/

# root @ nangy-vm in /usr/local [22:19:02] 
$ mkdir java

# root @ nangy-vm in /usr/local [22:19:09] 
$ ll | grep java
總用量 32K
drwxr-xr-x 2 root root 4.0K 6月  16 22:19 java

# root @ nangy-vm in /opt [22:19:14] 
$ tar -zxvf /home/nangy/Downloads/jdk-8u211-linux-x64.tar.gz -C /usr/local/java 

# root @ nangy-vm in /usr/local/java [22:22:32] 
$ cd /usr/local/java/jdk1.8.0_211 

# root @ nangy-vm in /opt/java/jdk1.8.0_211 [22:22:45] 
$ pwd
/usr/local/java/jdk1.8.0_211

2. 配置/etc/profile

root @ nangy-vm in /usr/local/java/jdk1.8.0_211 [22:22:46] 
$ vim /etc/profile

• 將變量配置添加到/etc/profile尾部

# JAVA_HOME
export JAVA_HOME=/usr/local/java/jdk1.8.0_211
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH

wq保存並退出

3. 使/etc/profile生效

# root @ nangy-vm in /usr/local/java/jdk1.8.0_211 [22:28:14] 
$ source /etc/profile
/etc/profile:35: no matches found: tty[1-6]

• 這裏遇到了一個坑
  應該是deppin使用第三方shell造成的，至少我使用zsh的時候是這樣
  解決方法：切換到bash再執行就OK了

# root @ nangy-vm in /usr/local/java/jdk1.8.0_211 [22:28:14] 
$ source /etc/profile
/etc/profile:35: no matches found: tty[1-6]

# 切換原生bash
# root @ nangy-vm in /usr/local/java/jdk1.8.0_211 [22:28:15] 
$ bash

# 執行source生效
root@nangy-vm:/usr/local/java/jdk1.8.0_211$ source /etc/profile

# 驗證jdk版本
root@nangy-vm:/usr/local/java/jdk1.8.0_211$ java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)

# 切換回zsh的shell界面
root@nangy-vm:/usr/local/java/jdk1.8.0_211$ zsh

# 驗證jdk版本
# root @ nangy-vm in /usr/local/java/jdk1.8.0_211 [22:36:20] 
$ java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)