How to install and configure Java environment

jdk version: jdk-8u131-linux-x64.rpm

Note: The following operations must be performed under the root user or a user with root permissions

1. Change dk- Copy 8u131-linux-x64.rpm to the /home directory

cp jdk-8u131-linux-x64.rpm /home/

2. Unzip the rpm file

rpm -ivh jdk-8u131-linux-x64.rpm

3. Configuration of environment variables

Note: The configuration of environment variables is a little more troublesome, but it is not particularly difficult.

1. Enter the following command to enter the configuration file

vim /etc/profile

2. After entering the configuration file, it is not editable at this time. If you want to edit data, first enter 'i', the word insert will be displayed below, and you can insert it. Just add the following code to the configuration file (remember to change the path to your own installation path).

java_home=/usr/java/jdk1.8.0_131
classpath=.:/usr/java/jdk1.8.0_131/jre/lib/rt,jar
path=$path/usr/java/jdk1.8.0_131
ecport path classpath java_home

3. After inserting, press 'esc', which will switch to the non-insertable state. Then enter ':wq' to save and exit.

4. Enter javac to check whether the configuration is successful

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