[Linux] install and configure JDK1.8 and install and configure jdk1.8.

[Linux] install and configure JDK1.8 and install and configure jdk1.8.

Step 1:To download jdk in Linux, go to the (Official Website) to download the jdk Installation File;

 

View the number of Linux operating systems:

[Root @ localhost ~] # Getconf LONG_BIT

 

Since my Linux is 64-bit, I downloadedJdk-8u151-linux-x64.tar.gz

As shown in:

 

　　　　

 

Step 2:New/Usr/javaFolderJdk-8u151-linux-x64.tar.gzPut it in this folder and switch the working directory/Usr/javaDirectory. As shown in:

 

　　　　

 

Step 3:Configure environment variables:

 

UseVim/etc/profileEditProfileFile, in/Etc/profileAdd the following content at the bottom:

[Root @ localhost ~] # Vim/etc/profile

 

 

JAVA_HOME =/usr/java/jdk1.8.0 _ 151

PATH = $ JAVA_HOME/bin: $ PATH

CLASSPATH = $ JAVA_HOME/jre/lib/ext: $ JAVA_HOME/lib/tools. jar

Export PATH JAVA_HOME CLASSPATH

 

　　　　

 

Step 4:UseSource/etc/profileLetProfileFile takes effect immediately

　　[Root @ localhost ~] # Source/etc/profile

 

Step 5:Command Test

① When using the javac command, there will be no command not found Error

② When java-version is used, the version is java version "1.8.0 _ 151"

③ Echo $ JAVA_HOME; echo $ CLASSPATH; echo $ PATH;

　　　　

 

OK