Installare il Java System CentOS 8
La seguente guida descrive l'installazione di Java in diverse versioni : Oracle Java 8, OpenJDK 8, OpenJDK 11
Su un server che esegue CentOS 8.
La reazione viene di eseguire diversi comandi.
Per un inizio cercheremo di pronti contro termine.
Il comando di reazione eseguire:
1 | dnf search jdk |
Otterrete qualcosa di simile:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | Last metadata expiration check: 1:23:41 ago on Wednesday 30 December 2019 02:23:23 AM EST. ========================================================= Summary & Name Matched: jdk ========================================================= java-11-openjdk-demo.x86_64 : OpenJDK Demos 11 java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos 8 java-11-openjdk-jmods.x86_64 : JMods for OpenJDK 11 java-11-openjdk-src.x86_64 : OpenJDK Source Bundle 11 java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle 8 java-11-openjdk.x86_64 : OpenJDK Runtime Environment 11 copy-jdk-configs.noarch : JDKs configuration files copier java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment 8 java-11-openjdk-javadoc.x86_64 : OpenJDK 11 API documentation java-1.8.0-openjdk-javadoc.noarch : OpenJDK 8 API documentation java-11-openjdk-devel.x86_64 : OpenJDK Development Environment 11 java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment 8 java-11-openjdk-headless.x86_64 : OpenJDK Headless Runtime Environment 11 java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK 8 accessibility connector java-1.8.0-openjdk-headless.x86_64 : OpenJDK Headless Runtime Environment 8 java-11-openjdk-javadoc-zip.x86_64 : OpenJDK 11 API documentation compressed in a single archive java-1.8.0-openjdk-javadoc-zip.noarch : OpenJDK 8 API documentation compressed in a single archive ============================================================ Summary Matched: jdk ============================================================= icedtea-web.noarch : Additional Java components for OpenJDK - Java browser plug-in and Web Start implementation |
installare OpenJDK 11
1 | dnf install java-11-openjdk-devel.x86_64 |
Controlliamo la versione Java del comando:
1 | java -version |
il risultato della:
1 2 3 | openjdk version "11.0.5" 2019-10-15 LTS OpenJDK Runtime Environment 18.9 (build 11.0.5+10-LTS) OpenJDK 64-Bit Server VM 18.9 (build 11.0.5+10-LTS, mixed mode, sharing) |
installare OpenJDK 8
1 | dnf install java-1.8.0-openjdk-devel |
controllare la versione:
1 | java -version |
risultato:
1 2 3 | openjdk version "1.8.0_232" OpenJDK Runtime Environment (build 1.8.0_232-b09) OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode) |
Per passare tra le versioni di un comando Java esecuzione:
1 | alternatives --config java |
Ho scelto il numero di versione appropriata:
1 2 3 4 5 6 7 8 | There are 2 programs which provide 'java'. Selection Command ----------------------------------------------- 1 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.5.10-0.el8_0.x86_64/bin/java) *+ 2 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.232.b09-0.el8_0.x86_64/jre/bin/java) Enter to keep the current selection[+], or type selection number: 1 |
Installazione di Oracle Java 8
1 | dnf localinstall jdk-8u231-linux-x64.rpm |
Beh, controllare la versione standard:
1 2 3 4 5 | java -version java version "1.8.0_231" Java(TM) SE Runtime Environment (build 1.8.0_231-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.231-b11, mixed mode) |
