在GNU/Linux中安裝配置Oracle JDK

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# curl -fsL / wget -qO-

# if need help info, specify '-h'
wget -qO- https://gitlab.com/MaxdSre/axd-ShellScript/raw/master/assets/software/OracleSEJDK.sh | sudo bash -s --

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# curl
curl -fsL -O -H "Cookie: oraclelicense=accept-securebackup-cookie" "${pack_download_link}"

# wget
wget -qO- -O "${pack_download_link##*/}" --header="Cookie: oraclelicense=accept-securebackup-cookie" "${pack_download_link}"

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pack_path='~/Downloads/jdk-12_linux-x64_bin.tar.gz'
installation_dir='/opt/OracleSEJDK'

tar xf "${source_pack_path}" -C "${installation_dir}" --strip-components=1 2> /dev/null

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┌─[[email protected]]─[/opt/OracleSEJDK]
└──╼ $tree -L 1

├── bin
├── conf
├── include
├── jmods
├── legal
├── lib
├── man
└── release

7 directories, 1 file
┌─[[email protected]]─[/opt/OracleSEJDK]
└──╼ $

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jdk_execute_path='/etc/profile.d/oracle_se_jdk.sh'

echo "export PATH=${installation_dir}/bin:\$PATH" >> "${jdk_execute_path}"

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funcAlternativeModeConfiguration(){
    local jdkcommand="${1:-}"
    local jdkaction="${2:-'install'}"
    local jdkdir="${3:-"${installation_dir}"}"

    if [[ -n "${jdkdir}" && -n "${alternative_command}" ]]; then
        local jdkcommand_path
        jdkcommand_path="${jdkdir}/bin/${jdkcommand}"

        case "${jdkaction}" in
            install )
                if [[ -s "${jdkcommand_path}" ]]; then
                    ${alternative_command} --install /usr/bin/"${jdkcommand}" "${jdkcommand}" "${jdkcommand_path}" 99 &> /dev/null
                    ${alternative_command} --set "${jdkcommand}" "${jdkcommand_path}" &> /dev/null
                fi
                ;;
            remove|* )
                if [[ -s "${jdkcommand_path}" ]]; then
                    ${alternative_command} --remove "${jdkcommand}" "${jdkcommand_path}" &> /dev/null
                fi
                ;;
        esac
    fi
}

alternative_command='alternatives'
# alternative_command='update-alternatives'

funcAlternativeModeConfiguration 'java' 'remove'
# funcAlternativeModeConfiguration 'javac' 'remove'
# funcAlternativeModeConfiguration 'jar' 'remove'

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┌─[[email protected]]─[~]
└──╼ $which java
/usr/bin/java
┌─[[email protected]]─[~]
└──╼ $java -version
java version "12" 2019-03-19
Java(TM) SE Runtime Environment (build 12+33)
Java HotSpot(TM) 64-Bit Server VM (build 12+33, mixed mode, sharing)
┌─[[email protected]]─[~]
└──╼ $update-alternatives --display java
java - manual mode
  link best version is /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
  link currently points to /opt/OracleSEJDK/bin/java
  link java is /usr/bin/java
  slave java.1.gz is /usr/share/man/man1/java.1.gz
/opt/OracleSEJDK/bin/java - priority 99
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java - priority 1081
  slave java.1.gz: /usr/lib/jvm/java-8-openjdk-amd64/jre/man/man1/java.1.gz
┌─[[email protected]]─[~]
└──╼ $