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This article focuses on "how to install java and configure environment variables in centos7". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to install java and configure environment variables in centos7.

Installation environment:

Centos7 64 bit

Jdk1.8 64 bit

Xshell Free win10* 64-bit

First, enter first, and you need to check whether your openjdk is uninstalled (or determine whether it exists, because usually centos is pre-installed with openjdk):

Enter rpm-qa in xshell or rpm-qa | grep jdk | grep java

Rpm-qa | grep java

Second, if you have a corresponding openjdk and a response list is displayed, you need to uninstall it.

Enter the rpm-e-nodepstzdata- file name in xshell (this is the file name in the list of openjdk files you view), and then delete it.

Third, create a java repository

1. First, return to the root directory and type cd/.

two。 Then enter mkdir java.

3. Then enter the java directory you just created, and enter cd java.

4. Enter the download address of java and download it.

The operation of steps 1-4 is as follows.

Cd/

Mkdirjava/

Cdjava

Wget-no-Check-certificate-no-cookies-header 'cookie: oraclelicense=accept-securebackup-cookie' http://download. Oracle.com/OTN-pub/java/JDK/8u 171-b11/512 CD 62 EC 5174 c 3487 AC 17 c 61 aa 89 E8/JDK-8u 171-Linux-x64. Tar. Gz5. Check the name of the currently downloaded file, and then extract the downloaded Java file.

Limit switch (Limit Switch)

Tar-zxvfjdk-8u171-linux-x64.tar.gz IV. After completing the above steps, configure the environment variables.

Vi / etc/profile

At the end of the file, add the following code

Export Java _ HOME=/Java/JDK 1. 8. 0 _ 171

Export CLaSS=. $JAVA _ HOME/JRE/lib/rt. Jar: $JAVA _ HOME/lib/dt. Jar: $JAVA _ HOME/lib/tools. Jar

Export path = $Java _ home/bin: $path//, then save and exit. After saving, you must execute the following source / etc/profile to reset the file for it to take effect.

5. Execute the java version to see if the configuration is successful (following indicates that the configuration is successful).

Jave droge'1. 8. 0 _ 144'

Java (TM) Seruntimeenvironment (build 1. 8. 0 _ 144-b01)

At this point, I believe you have a deeper understanding of "how to install java and configure environment variables in centos7". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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