How to download jdk in centos system

Download jdk-8u152-linux-x64.rpm or jdk-8u152-linux-x64.tar.gz (select the corresponding package according to the number of bits of your system)

As shown in the picture:

The steps to install jdk are as follows:

Because the CentOS7.4 system I installed comes with jdk1.8, so in order to demonstrate how To install jdk, I need to uninstall the jdk that comes with the system first

Check the current system jdk version:

java -version

List the software packages that match the installed java :

yum list installed | grep java

(Recommended tutorial: centos usage tutorial)

1. Uninstall the installed jdk:

yum -y remove java-1.7.0-openjdk*
yum -y remove java-1.8.0-openjdk*

2. Install jdk

Create a new java folder in /usr/, mkdir java uses Xftp to upload the downloaded jdk-8u211-linux-x64.tar.gz to /usr/java, chmod 777 /usr/java

# is required. ##3. Unzip the package:

tar -zxvf jdk-8u211-linux-x64.tar.gz

The java -version command cannot be used at this time.

4. Configure environment variables:

Use vim /etc/profile to edit the profile file and enter:

vim /etc/profile

Press i to enter the editing mode

Into the file Append the following content:

export JAVA_HOME=/usr/java/jdk1.8.0_211
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

After editing, press Esc and enter: wq to exit

Save and exit. At this time, you need to execute the command to take effect of the environment variable:

source /etc/profile

echo to check whether it takes effect.

echo $JAVA_HOME
/usr/java/jdk1.8.0_211

After the environment variables are set, it is normal to be able to access the content by typing: java, javac, java -version.

Recommended related video tutorials:

linux video tutorial

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