On 1/12/18, Bastien Durel <bast...@durel.org> wrote: > Le vendredi 12 janvier 2018 à 04:20 -0500, Albretch Mueller a écrit : >> java gives you error messages when you compile and run code with >> different versions of the JVM >> >> while trying to update my box using apt-get I am getting: >> "openjdk-8-jdk is already the newest version." >> >> How do you make sure you install the same version of both java and >> javac using apt-get? >> >> lbrtchx >> ~ >> $ uname -a >> Linux IBMThnkPdT60 3.16.0-4-686-pae #1 SMP Debian 3.16.36-1+deb8u1 >> (2016-09-03) i686 GNU/Linux >> >> $ java -version >> openjdk version "1.8.0_131" >> OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-1~bpo8+1-b11) >> OpenJDK Server VM (build 25.131-b11, mixed mode) >> >> $ javac -version >> javac 1.7.0_111 >> >> >> # _LOG_FL="openjdk-8-jdk_install_$(date +%Y%m%d%H%M%S).log" >> >> # uname -a >> "${_LOG_FL}" 2>&1 >> >> # time(apt-get -V install openjdk-8-jdk) >> "${_LOG_FL}" 2>&1 >> >> # cat openjdk-8-jdk_install_20180112040601.log >> Linux IBMThnkPdT60 3.16.0-4-686-pae >> #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03) i686 GNU/Linux >> >> Reading package lists... >> Building dependency tree... >> Reading state information... >> openjdk-8-jdk is already the newest version. >> 0 upgraded, 0 newly installed, 0 to remove and 365 not upgraded. >> >> real 0m3.571s >> user 0m0.672s >> sys 0m0.092s >> >> # java -version >> openjdk version "1.8.0_131" >> OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-1~bpo8+1-b11) >> OpenJDK Server VM (build 25.131-b11, mixed mode) >> >> # javac -version >> javac 1.7.0_111 >> > You d'like to look at your alternatives > > $ ls -l /etc/alternatives/java* > lrwxrwxrwx 1 root root 46 juil. 2 2017 /etc/alternatives/java -> > /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java > lrwxrwxrwx 1 root root 56 juil. 2 2017 /etc/alternatives/java.1.gz -> > /usr/lib/jvm/java-8-openjdk-amd64/jre/man/man1/java.1.gz > lrwxrwxrwx 1 root root 39 déc. 14 2010 /etc/alternatives/java_vm -> > /usr/lib/jvm/java-6-sun/jre/bin/java_vm > lrwxrwxrwx 1 root root 38 déc. 14 2010 /etc/alternatives/javaws -> > /usr/lib/jvm/java-6-sun/jre/bin/javaws > lrwxrwxrwx 1 root root 48 déc. 14 2010 /etc/alternatives/javaws.1.gz > -> /usr/lib/jvm/java-6-sun/jre/man/man1/javaws.1.gz > > On this box, java and javaws use different java versions > You can set them using update-alternatives(1) -- or update-java- > alternatives(8) for java
Well, yes, but, based on my poor understanding of such matters, how can you change the alternatives if apt-get doesn't install more updated versions? I think you should be able to specify to the differencet utilities in the jdk. This is what I got in my env: $ ls -l /etc/alternatives/java* lrwxrwxrwx 1 root root 45 Dec 17 18:16 /etc/alternatives/java -> /usr/lib/jvm/java-8-openjdk-i386/jre/bin/java lrwxrwxrwx 1 root root 55 Dec 17 18:16 /etc/alternatives/java.1.gz -> /usr/lib/jvm/java-8-openjdk-i386/jre/man/man1/java.1.gz lrwxrwxrwx 1 root root 42 Nov 11 22:14 /etc/alternatives/javac -> /usr/lib/jvm/java-7-openjdk-i386/bin/javac lrwxrwxrwx 1 root root 52 Nov 11 22:14 /etc/alternatives/javac.1.gz -> /usr/lib/jvm/java-7-openjdk-i386/man/man1/javac.1.gz lrwxrwxrwx 1 root root 44 Nov 11 22:14 /etc/alternatives/javadoc -> /usr/lib/jvm/java-7-openjdk-i386/bin/javadoc lrwxrwxrwx 1 root root 54 Nov 11 22:14 /etc/alternatives/javadoc.1.gz -> /usr/lib/jvm/java-7-openjdk-i386/man/man1/javadoc.1.gz lrwxrwxrwx 1 root root 42 Nov 11 22:14 /etc/alternatives/javah -> /usr/lib/jvm/java-7-openjdk-i386/bin/javah lrwxrwxrwx 1 root root 52 Nov 11 22:14 /etc/alternatives/javah.1.gz -> /usr/lib/jvm/java-7-openjdk-i386/man/man1/javah.1.gz lrwxrwxrwx 1 root root 42 Nov 11 22:14 /etc/alternatives/javap -> /usr/lib/jvm/java-7-openjdk-i386/bin/javap lrwxrwxrwx 1 root root 52 Nov 11 22:14 /etc/alternatives/javap.1.gz -> /usr/lib/jvm/java-7-openjdk-i386/man/man1/javap.1.gz $ # update-alternatives --config java There are 2 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ 0 /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java 1071 auto mode 1 /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java 1071 manual mode * 2 /usr/lib/jvm/java-8-openjdk-i386/jre/bin/java 1069 manual mode Press enter to keep the current choice[*], or type selection number: # update-alternatives --config javac There are 2 choices for the alternative javac (providing /usr/bin/javac). Selection Path Priority Status ------------------------------------------------------------ * 0 /usr/lib/jvm/java-7-openjdk-i386/bin/javac 1071 auto mode 1 /usr/lib/jvm/java-7-openjdk-i386/bin/javac 1071 manual mode 2 /usr/lib/jvm/java-8-openjdk-i386/bin/javac 1069 manual mode Press enter to keep the current choice[*], or type selection number: # ~ lbrtchx