Linux系统安装JDK

Linux系统安装JDK

1.卸载系统 openjdk

[root@server ~]# yum remove *openjdk* -y

2.查看卸载情况

[root@server ~]#rpm -qa | grep java
javapackages-tools-3.4.1-5.el7.noarch
python-javapackages-3.4.1-5.el7.noarch
tzdata-java-2014b-1.el7.noarch

3.下载JDK

[root@server ~]# ll /mnt/apache+jdk+tomcat/jdk-9.0.1_linux-x64_bin.tar.gz
-rw-r--r-- 1 root root 354531775 Jan 12 08:42 /mnt/apache+jdk+tomcat/jdk-9.0.1_linux-x64_bin.tar.gz

4.解压jdk-9.0.1_linux-x64_bin.tar.gz 安装包

[root@server ~]# mkdir /usr/java/
[root@server ~]# cd /usr/java/

[root@server java]# tar -zxvf /mnt/apache+jdk+tomcat/jdk-9.0.1_linux-x64_bin.tar.gz
[root@server java]# ls
jdk-9.0.1

5.配置环境变量

[root@server java]# vim /etc/profile

export JAVA_HOME=/usr/java/jdk-9.0.1
export JRE_HOME=/usr/java/jdk-9.0.1/jre
exportCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin

6.生效之

[root@server java]# source /etc/profile

7.测试安装结果

[root@server java]# java -version
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)