1、下载JDK:
在JAVA官网http://www.oracle.com/technetwork/java/javase/downloads/jdk10-downloads-4416644.html中,选择linux系统下的tar.gz文件。
2、解压并安装:
使用快捷键Ctrl+Alt+T组合键打开终端窗口,进入安装包所在文件夹,将其解压到/usr/loacl目录中。
~$ cd ~/下载
~/下载$ sudo tar zxvf jdk-10.0.1_linux-x64_bin.tar.gz -C /usr/local
查看是否安装成功:
~/下载$ cd /usr/local
/usr/local$ ls -lh
显示:
总用量 36K
drwxr-xr-x 2 root root 4.0K Apr 26 11:18 bin
drwxr-xr-x 2 root root 4.0K Apr 26 11:18 etc
drwxr-xr-x 2 root root 4.0K Apr 26 11:18 games
drwxr-xr-x 2 root root 4.0K Apr 26 11:18 include
drwxr-xr-x 8 root root 4.0K May 2 03:54 jdk-10.0.1
drwxr-xr-x 3 root root 4.0K May 2 02:55 lib
lrwxrwxrwx 1 root root 9 May 2 01:51 man -> share/man
drwxr-xr-x 2 root root 4.0K Apr 26 11:18 sbin
drwxr-xr-x 6 root root 4.0K Apr 26 11:23 share
drwxr-xr-x 2 root root 4.0K Apr 26 11:18 src
3、添加JDK环境变量:
打开当前用户的配置文件.bashrc
$ gedit ~/.bashrc
在配置文件末尾添加
export JAVA_HOME=/usr/local/jdk-10.0.1
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
允许如下命令,使配置文件生效
$sudo source ~/.bashrc
4、配置默认JDK版本:
$ sudo update-alternatives --install /usr/bin/java java /usr/local/jdk-10.0.1/bin/java 300
$ sudo update-alternatives --install /usr/bin/javac javac /usr/local/jdk-10.0.1/bin/javac 300
$ sudo update-alternatives --install /usr/bin/jar jar /usr/local/jdk-10.0.1/bin/jar 300
$ sudo update-alternatives --install /usr/bin/javap javap /usr/local/jdk-10.0.1/bin/javap 300
并执行以下命令:
$ sudo update-alternatives --config java
5、检测安装是否成功:
$ java -version
显示如下:
java version "10.0.1" 2018-04-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode)
安装完成