How to install jdk14 under linux system

Environment: centos8 and jdk14

(Recommended learning: java entry program)

The specific steps are as follows:

First put the jdk compressed file into /usr/local/java. This java file was created later.

1. Decompress the jdk compressed file

tar  -zxvf 压缩包名：解压这个压缩包

2. Change the decompressed file to a simple name

rename 包名 新名

3. Because jdk has no jre file since jdk 9 We need to generate a jre file ourselves, and we execute this command in the decompressed directory.

bin/jlink --module-path jmods --add-modules java.desktop --output jre

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4. Then we go to the file /etc/profile and write the environment variable

vim /etc/profile

Write the environment variable at the end of the file

export JAVA_HOME=/usr/local/jdk14
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

5. Check the current path with the pwd command

6. Finally, remember to execute the save command

source /etc/profile

7 , finally enter the command to see if your configuration is correct

java -version

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