Replace CENTOS7 source Installation oraclejdk__oracle

Install CENTOS7 64-bit Operating system (abbreviated)

Note: I installed the server with the GUI when I chose, and I checked the development tools option Replace Centos7 original source for Ali first backup
cd/etc/yum.repos.d/
MV centos-base.repo/etc/yum.repos.d/centos-base.repo.backup Download Ali source Repo file
wget Http://mirrors.aliyun.com/repo/Centos-7.repo Insert Code
MV Centos-7.repo Centos-base.repo Update system
Yum Clean All
Yum Makecache
Yum Update reboot System
Init 6 Uninstall OPENJDK, install Oracle JDK

1. Download jdk-8u161-linux-x64.tar.gz (Oracle website download)
2. Upload jdk to Centos7/usr/local/java using Xshell

    cd/usr/local/
    mkdir java
    upload jdk-8u161-linux-x64.tar.gz

3. Uninstall OPENJDK

    [1] Using Rpm-qa | grep Java Query System with JDK
    [2] Uninstall non-noarch file
        1), rpm-e--nodeps java-1.8.0-openjdk-1.8.0.131-11.b12.el7.x86_64
        2) , rpm-e--nodeps java-1.8.0-openjdk-headless-1.8.0.131-11.b12.el7.x86_64
    [3]rpm-qa | grep java command to query whether to delete

4. Install the Sun's JDK

    [1]cd/usr/local/java/
    [2]tar xvf jdk-8u161-linux-x64.tar.gz
    [3]rm-f jdk-8u161-linux-x64.tar.gz
    [4] Edit/ Content in Etc/profile
        1), vim/etc/profile after I enter insert mode, add environment variables at the end of the file
            export java_home=/usr/local/java/jdk1.8.0 _161
            export classpath=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar
            export path= $PATH: $JAVA _home/ Bin
        2), save and exit 
            mode one: Press the ESC key and then enter: Wq
            mode two: Hold down the SHIFT key and double-click two times Z
    [5] To restart profile
        Source/etc/profile
    [6] test JDK
        1), Javac
        2), java-version