関連ワード:  install java openjdk 21 ubuntu    install java openjdk 21    install java openjdk 21 windows    install java openjdk 21 mac    install java openjdk 21 debian    install java 21 openjdk linux    install java-21-openjdk-amd64    install java-21-openjdk-devel    install java 21 openjdk    brew install java openjdk 21