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Ubuntu 20.04にOpenJDK 8(1.8)をインストール(OS標準)

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はじめに

Ubuntu20.04にOpenJDKを標準インストール
親記事:OpenJDKの各種インストール方法とEOLまとめ

サポート

Java Is Still Free (日本語版)では、”At least through Sept 2023” という記載がある。またOSのEOLは2025-04となる。
ただしAnnouncing OpenJDK 11 packages in Ubuntu 18.04 LTS | Ubuntuによると、Ubuntu18.04は2021-04までの保守になる模様。
Ubuntu20.04での保守期間がどうなるかは不明。

LOG

インストール

# cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

# apt update;apt install -y openjdk-8-jdk
... 略

各種確認

# which java
/usr/bin/java

# java -version
openjdk version "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1ubuntu1-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)
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