Install and uninstall Oracle JDK 8 on CentOS 6








  • Uninstall JDK 7:
    1. Find the installed rpm package:
      sudo rpm -qa | grep jdk | grep fcs
      it should return the package name, like
      jdk-1.7.0_51-fcs.x86_64
    2. Remove the package:
      sudo rpm -e -1.7.0_51-fcs
  • Install JDK 8:
    1. Download the JDK RPM package from Oracle
    2. Install the RPM package:
      sudo rpm -Uvh jdk-8u5-linux-x64.rpm
    3. Set up alternatives:
      sudo alternatives --install /usr/bin/java java /usr/java/latest/jre/bin/java 200000
      sudo alternatives --install /usr/bin/javaws javaws /usr/java/latest/jre/bin/javaws 200000
      sudo alternatives --install /usr/lib64/mozilla/plugins/libjavaplugin.so libjavaplugin.so.x86_64 /usr/java/latest/jre/lib/amd64/libnpjp2.so 200000
      sudo alternatives --install /usr/bin/javac javac /usr/java/latest/bin/javac 200000
      sudo alternatives --install /usr/bin/jar jar /usr/java/latest/bin/jar 200000



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