Install jdk1.8 in Linux(CentOS7).

Check whether the JDK comes with you

rpm -qa|grep java
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If there is use the following command to delete, XXX yyy ZZZ represents the query out of the JDK name, name separated by a space in the middle, so far has not encountered the own.

rpm -e --nodeps xxx yyy zzz
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Second, download JDK upload

If you want to use jdK8, you can download the JDK from jdK8’s official website. If you want to use jdK8’s official website, you can download JDK from JDK8’s official website. Upload the file to the /usr/local/src directory in Linux.

Install the JDK

1. Create a directory and decompress the directory to the specified directory

mkdir -p /usr/local/java

tar -zxvf jdk-8u202-linux-x64.tar.gz -C /usr/local/java/
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2. Configure environment variables

After the decompression is complete, edit the configuration file and configure environment variables.

vim /etc/profile
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At the bottom of the file add:

Export JAVA_HOME=/usr/local/ Java /jdk1.8.0_202 export JRE_HOME=$JAVA_HOME/jre export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH export CLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JRE_HOME/libCopy the code

Save the configuration and exit to refresh the configuration.

source /etc/profile
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3. Verify whether the JDK configuration is successful

java -version
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If the following JDK version information is displayed, the configuration succeeds.

Java version "1.8.0_202" Java(TM) SE Runtime Environment (Build 1.8.0_202-B08) Java HotSpot(TM) 64-bit Server VM (build 25.202 - b08, mixed mode)Copy the code

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Author: IT wang2 xiao3 er4 starting address: www.itwxe.com/posts/c74ad… Copyright notice: The content of this article is licensed by authorship – non-commercial use – No Interpretation 4.0 international.