CentOS8安装jdk1.8

安装方法#

CentOS8上使用 yum 直接安装，环境变量自动配置好

查看是否已安装#

看到下面结果，说明已经安装配置 jdk

[root@iZ2ze8crquorxf6c7l0eluZ ~]# java -version
openjdk version "1.8.0_262"
OpenJDK Runtime Environment (build 1.8.0_262-b10)
OpenJDK 64-Bit Server VM (build 25.262-b10, mixed mode)

卸载#

查看系统是否自带 jdk

rpm -qa |grep java
rpm -qa |grep jdk
rpm -qa |grep gcj

如果有输出信息，批量卸载系统自带

rpm -qa | grep java | xargs rpm -e --nodeps

如果使用 yum 安装的 jdk，请使用下面命令卸载

yum -y remove java-1.8.0-openjdk-headless.x86_64

查看jdk1.8最新版本#

yum list java-1.8*

可以看到如下输出

[root@iZ2ze8crquorxf6c7l0eluZ ~]# yum list java-1.8*
Last metadata expiration check: 0:46:31 ago on Sun 16 Aug 2020 11:28:56 PM CST.
Installed Packages
java-1.8.0-openjdk.x86_64                                                    1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-accessibility.x86_64                                      1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-demo.x86_64                                               1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-devel.x86_64                                              1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-headless.x86_64                                           1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-javadoc.noarch                                            1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-javadoc-zip.noarch                                        1:1.8.0.262.b10-0.el8_2                                       @AppStream
java-1.8.0-openjdk-src.x86_64                                                1:1.8.0.262.b10-0.el8_2                                       @AppStream

安装jdk1.8#

yum install java-1.8.0-openjdk* -y

查看当前jdk版本#

java -version