centOS上JDK安裝

JDK安裝

  1. 檢查是否已經安裝 JDK

    使用以下命令檢查是否已經安裝 JDK,若已經安裝 JDK,則不需要重新安裝。

        yum list installed | grep java
        
若已經安裝,則出現以下的顯示:
    java-1.8.0-openjdk.x86_64                    1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-accessibility.x86_64      1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-demo.x86_64               1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-devel.x86_64              1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-headless.x86_64           1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-headless-slowdebug.x86_64 1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-javadoc.noarch            1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-javadoc-zip.noarch        1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-slowdebug.x86_64          1:1.8.0.302.b08-0.el8_4                @AppStream
java-1.8.0-openjdk-src.x86_64                1:1.8.0.302.b08-0.el8_4                @AppStream
java-atk-wrapper.x86_64                      0.33.2-6.el8                           @AppStream
javapackages-filesystem.noarch               5.3.0-1.module_el8.0.0+11+5b8c10bd     @AppStream
tzdata-java.noarch                           2021a-1.el8                            @AppStream
若未安裝 **JDK** ,進行下面的步驟。
  1. 安裝JDK

查看JDK軟件包列表:

    yum search java | grep -i jdk

顯示以下:

 java-11-openjdk.x86_64 : OpenJDK 11 Runtime Environment
 java-11-openjdk.x86_64 : OpenJDK 11 Runtime Environment
 java-1.8.0-openjdk.x86_64 : OpenJDK 8 Runtime Environment
 java-1.8.0-openjdk.x86_64 : OpenJDK 8 Runtime Environment
 java-11-openjdk-src.x86_64 : OpenJDK 11 Source Bundle
 java-latest-openjdk.x86_64 : OpenJDK 16 Runtime Environment
 java-11-openjdk-demo.x86_64 : OpenJDK 11 Demos
 java-11-openjdk-devel.x86_64 : OpenJDK 11 Development Environment
 java-11-openjdk-devel.x86_64 : OpenJDK 11 Development Environment
 java-11-openjdk-jmods.x86_64 : JMods for OpenJDK 11
 java-1.8.0-openjdk-src.x86_64 : OpenJDK 8 Source Bundle
 java-1.8.0-openjdk-src.x86_64 : OpenJDK 8 Source Bundle
 java-1.8.0-openjdk-demo.x86_64 : OpenJDK 8 Demos
 java-1.8.0-openjdk-demo.x86_64 : OpenJDK 8 Demos
 java-11-openjdk-javadoc.x86_64 : OpenJDK 11 API documentation
 java-latest-openjdk-src.x86_64 : OpenJDK 16 Source Bundle
 java-1.8.0-openjdk-devel.x86_64 : OpenJDK 8 Development Environment
 java-11-openjdk-headless.x86_64 : OpenJDK 11 Headless Runtime Environment
 java-1.8.0-openjdk-devel.x86_64 : OpenJDK 8 Development Environment
 java-11-openjdk-headless.x86_64 : OpenJDK 11 Headless Runtime Environment
 java-latest-openjdk-demo.x86_64 : OpenJDK 16 Demos
 java-latest-openjdk-devel.x86_64 : OpenJDK 16 Development Environment
 java-latest-openjdk-jmods.x86_64 : JMods for OpenJDK 16
 java-1.8.0-openjdk-javadoc.noarch : OpenJDK 8 API documentation
 java-1.8.0-openjdk-javadoc.noarch : OpenJDK 8 API documentation

選擇版本進行安裝:

#使用以下命令,安裝jdk 1.8.0 的所有文件
yum install -y java-1.8.0-openjdk*

查看JDK是否安裝成功

java -version

顯示如下則表示安裝成功:

[root@iZ2ze462m6o0ncl5uigv8hZ ~]# java -version
 openjdk version "1.8.0_302"
 OpenJDK Runtime Environment (build 1.8.0_302-b08)
 OpenJDK 64-Bit Server VM (build 25.302-b08, mixed mode)

配置JDK環境變量

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