文章目錄
- 一、解除安裝openjdk
-
- 1. 檢視openjdk版本
- 2. 解除安裝openjdk
- 二、下載下傳jdk1.8
- 三、安裝jdk1.8
-
- 方法一、手動配置
-
- 1. 準備jdk檔案
- 2. 配置`/etc/profile`
- 3. 使`/etc/profile`生效
一、解除安裝openjdk
1. 檢視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. 解除安裝openjdk
# 本機沒有,那就不用解除安裝,直接安裝jdk
# 如果你的系統有,則執行解除安裝
sudo apt-get remove openjdk*
二、下載下傳jdk1.8
官網下載下傳 | JDK 8u211
三、安裝jdk1.8
方法一、手動配置
1. 準備jdk檔案
先下載下傳
.tar.gz
壓縮包
# nangy @ nangy-vm in ~ [22:09:35] C:1
$ cp /mnt/hgfs/VMware共享檔案/software/jdk-8u211-linux-x64.tar.gz -R /home/nangy/Downloads
# 以下操作切換成root使用者
# 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
/etc/profile
root @ nangy-vm in /usr/local/java/jdk1.8.0_211 [22:22:46]
$ vim /etc/profile
- 将變量配置添加到
尾部/etc/profile
# 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
儲存并退出
3. 使 /etc/profile
生效
/etc/profile
# 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]
-
這裡遇到了一個坑
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
[email protected]:/usr/local/java/jdk1.8.0_211$ source /etc/profile
# 驗證jdk版本
[email protected]:/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
[email protected]:/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)