Deepin安装jdk（卸载openjdk）

一、卸载openjdk

1. 查看openjdk版本

# nangy &＃64; nangy-vm in ~ [22:07:46]
$ java -version
zsh: command not found: java# nangy &＃64; nangy-vm in ~ [22:09:22] C:127
$ dpkg -l | grep openjdk


2. 卸载openjdk

# 本机没有&＃xff0c;那就不用卸载&＃xff0c;直接安装jdk
# 如果你的系统有&＃xff0c;则执行卸载
sudo apt-get remove openjdk*


二、下载jdk1.8

官网下载 | JDK 8u211

三、安装jdk1.8

方法一、手动配置

1. 准备jdk文件

先下载.tar.gz压缩包

# nangy &＃64; 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 # 以下操作切换成root用户
# nangy &＃64; nangy-vm in ~ [22:16:31]
$ su# root &＃64; nangy-vm in /home/nangy [22:18:46]
$ cd /usr/local/# root &＃64; nangy-vm in /usr/local [22:19:02]
$ mkdir java# root &＃64; nangy-vm in /usr/local [22:19:09]
$ ll | grep java
总用量 32K
drwxr-xr-x 2 root root 4.0K 6月 16 22:19 java# root &＃64; nangy-vm in /opt [22:19:14]
$ tar -zxvf /home/nangy/Downloads/jdk-8u211-linux-x64.tar.gz -C /usr/local/java # root &＃64; nangy-vm in /usr/local/java [22:22:32]
$ cd /usr/local/java/jdk1.8.0_211 # root &＃64; 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 &＃64; nangy-vm in /usr/local/java/jdk1.8.0_211 [22:22:46]
$ vim /etc/profile


• 将变量配置添加到/etc/profile尾部

# JAVA_HOME
export JAVA_HOME&＃61;/usr/local/java/jdk1.8.0_211
export CLASSPATH&＃61;.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH&＃61;$JAVA_HOME/bin:$PATH


wq保存并退出

3. 使/etc/profile生效

# root &＃64; 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]


• 这里遇到了一个坑
  应该是deppin使用第三方shell造成的&＃xff0c;至少我使用zsh的时候是这样
  解决方法&＃xff1a;切换到bash再执行就OK了

# root &＃64; 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]# 切换原生bash
# root &＃64; nangy-vm in /usr/local/java/jdk1.8.0_211 [22:28:15]
$ bash# 执行source生效
root&＃64;nangy-vm:/usr/local/java/jdk1.8.0_211$ source /etc/profile# 验证jdk版本
root&＃64;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)# 切换回zsh的shell界面
root&＃64;nangy-vm:/usr/local/java/jdk1.8.0_211$ zsh# 验证jdk版本
# root &＃64; 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)