1.查看java的所有版本：

yum list java*

输出：

[root@localhost ~]# yum list java*
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile* base: mirrors.ustc.edu.cn* centos-sclo-rh: ftp.sjtu.edu.cn* centos-sclo-sclo: ftp.sjtu.edu.cn* extras: mirrors.ustc.edu.cn* updates: mirrors.ustc.edu.cn
可安装的软件包
java-1.6.0-openjdk.x86_64                                                                                     1:1.6.0.41-1.13.13.1.el7_3                                                                        base   
java-1.6.0-openjdk-demo.x86_64                                                                                1:1.6.0.41-1.13.13.1.el7_3                                                                        base   
java-1.6.0-openjdk-devel.x86_64                                                                               1:1.6.0.41-1.13.13.1.el7_3                                                                        base   
java-1.6.0-openjdk-javadoc.x86_64                                                                             1:1.6.0.41-1.13.13.1.el7_3                                                                        base   
java-1.6.0-openjdk-src.x86_64                                                                                 1:1.6.0.41-1.13.13.1.el7_3                                                                        base   
java-1.7.0-openjdk.x86_64                                                                                     1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.7.0-openjdk-accessibility.x86_64                                                                       1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.7.0-openjdk-demo.x86_64                                                                                1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.7.0-openjdk-devel.x86_64                                                                               1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.7.0-openjdk-headless.x86_64                                                                            1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.7.0-openjdk-javadoc.noarch                                                                             1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.7.0-openjdk-src.x86_64                                                                                 1:1.7.0.261-2.6.22.2.el7_8                                                                        base   
java-1.8.0-openjdk.i686                                                                                       1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk.x86_64                                                                                     1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-accessibility.i686                                                                         1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-accessibility.x86_64                                                                       1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-demo.i686                                                                                  1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-demo.x86_64                                                                                1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-devel.i686                                                                                 1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-devel.x86_64                                                                               1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-headless.i686                                                                              1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-headless.x86_64                                                                            1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-javadoc.noarch                                                                             1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-javadoc-zip.noarch                                                                         1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-src.i686                                                                                   1:1.8.0.392.b08-2.el7_9                                                                           updates
java-1.8.0-openjdk-src.x86_64                                                                                 1:1.8.0.392.b08-2.el7_9                                                                           updates
java-11-openjdk.i686                                                                                          1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk.x86_64                                                                                        1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-demo.i686                                                                                     1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-demo.x86_64                                                                                   1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-devel.i686                                                                                    1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-devel.x86_64                                                                                  1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-headless.i686                                                                                 1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-headless.x86_64                                                                               1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-javadoc.i686                                                                                  1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-javadoc.x86_64                                                                                1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-javadoc-zip.i686                                                                              1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-javadoc-zip.x86_64                                                                            1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-jmods.i686                                                                                    1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-jmods.x86_64                                                                                  1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-src.i686                                                                                      1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-src.x86_64                                                                                    1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-static-libs.i686                                                                              1:11.0.21.0.9-1.el7_9                                                                             updates
java-11-openjdk-static-libs.x86_64                                                                            1:11.0.21.0.9-1.el7_9                                                                             updates
java-atk-wrapper.i686                                                                                         0.30.4-5.el7                                                                                      base   
java-atk-wrapper.x86_64                                                                                       0.30.4-5.el7                                                                                      base   
java-dirq.noarch                                                                                              1.8-1.el7                                                                                         epel   
java-dirq-javadoc.noarch                                                                                      1.8-1.el7                                                                                         epel   
java-oauth.noarch                                                                                             20100601-13.el7                                                                                   epel   
java-oauth-javadoc.noarch                                                                                     20100601-13.el7                                                                                   epel   
java-runtime-decompiler.noarch                                                                                5.1-1.el7                                                                                         epel   
java-runtime-decompiler-javadoc.noarch                                                                        5.1-1.el7                                                                                         epel   
java_cup.noarch                                                                                               1:0.11a-16.el7                                                                                    base   
java_cup-javadoc.noarch                                                                                       1:0.11a-16.el7                                                                                    base   
java_cup-manual.noarch                                                                                        1:0.11a-16.el7                                                                                    base   
javacc.noarch                                                                                                 5.0-10.el7                                                                                        base   
javacc-demo.noarch                                                                                            5.0-10.el7                                                                                        base   
javacc-javadoc.noarch                                                                                         5.0-10.el7                                                                                        base   
javacc-manual.noarch                                                                                          5.0-10.el7                                                                                        base   
javacc-maven-plugin.noarch                                                                                    2.6-17.el7                                                                                        base   
javacc-maven-plugin-javadoc.noarch                                                                            2.6-17.el7                                                                                        base   
javamail.noarch                                                                                               1.4.6-8.el7                                                                                       base   
javamail-javadoc.noarch                                                                                       1.4.6-8.el7                                                                                       base   
javapackages-tools.noarch                                                                                     3.4.1-11.el7                                                                                      base   
javaparser.noarch                                                                                             1.0.11-3.el7                                                                                      epel   
javaparser-javadoc.noarch                                                                                     1.0.11-3.el7                                                                                      epel   
javassist.noarch                                                                                              3.16.1-10.el7                                                                                     base   
javassist-javadoc.noarch                                                                                      3.16.1-10.el7                                                                                     base   
javastroke.x86_64                                                                                             0.5.1-33.el7                                                                                      epel   
javawriter.noarch                                                                                             2.5.1-4.el7                                                                                       epel   
javawriter-javadoc.noarch

2.安装java-11：

 yum install yum install java-11-openjdk.x86_64