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Bernardo Harreguy
Asked: 2020-05-29 03:58:55 +0800 CST 2020-05-29 03:58:55 +0800 CST

Run Eclipse 3.7.2 on Linux Mint 19 using Java 7

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I have to make a project under a plugin that requires Eclipse 3.7.2 , but it was no longer supported when Java 8 came out.

I currently have Linux Mint 19 and the latest version of OpenJDK. Is there any way to make it work?

With a bottle of JDK version 7 I think, it works, right?

java

1 Answers

  1. Best Answer

    For a few years, Oracle stopped giving support and public updates to Oracle Java 7 and now it can only be done by entering a username and password on the Oracle website, so many PPAs that offered Java 7 can no longer download and install automatically OracleJava.

    To install Oracle Java 7 on a Debian-based Linux distribution like Linux Mint you need to navigate to the following page to download the JDK:

    https://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html

    Accept the license agreement and click the link jdk-7u80-linux-x64.tar.gzto be sent to the Oracle Account Sign In page where you will need to sign up for free (or sign in with an account you have) and download the file.

    We start assuming that you have OpenJDK JDK 8 installed:

    # update-alternatives --display java
java - modo automático
 la mejor versión del enlace es /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java.
 el enlace apunta actualmente a /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
 el enlace java es /usr/bin/java
# update-alternatives --display javac
javac - modo automático
 la mejor versión del enlace es /usr/lib/jvm/java-8-openjdk-amd64/bin/javac.
 el enlace apunta actualmente a /usr/lib/jvm/java-8-openjdk-amd64/bin/javac
 el enlace javac es /usr/bin/javac
# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-8u212-b03-0ubuntu1.18.04.1-b03)
OpenJDK 64-Bit Server VM (build 25.212-b03, mixed mode)

    Once the file is downloaded, you must unzip it as root by typing the following instruction:

    tar zxvf jdk-7u80-linux-x64.tar.gz -C /usr/lib/jvm/
mv /usr/lib/jvm/jdk1.7.0_80 /usr/lib/jvm/java-7-oracle-amd64

    Now we add this new version to the alternatives of the operating system by increasing the priority that OpenJDK has by default by 1:

    # update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-7-oracle-amd64/bin/java 1082
update-alternatives: utilizando /usr/lib/jvm/java-7-oracle-amd64/bin/java para proveer /usr/bin/java (java) en modo automático
# update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-7-oracle-amd64/bin/javac 1082
update-alternatives: utilizando /usr/lib/jvm/java-7-oracle-amd64/bin/javac para proveer /usr/bin/javac (javac) en modo automático

    Now we can check that we are using the new installed version:

    # java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)

    When you want to change the version you must type:

    # update-alternatives --config javac
Existen 2 opciones para la alternativa javac (que provee /usr/bin/javac).

  Selección   Ruta                                         Prioridad  Estado
------------------------------------------------------------
* 0            /usr/lib/jvm/java-7-oracle-amd64/bin/javac    1082      modo automático
  1            /usr/lib/jvm/java-7-oracle-amd64/bin/javac    1082      modo manual
  2            /usr/lib/jvm/java-8-openjdk-amd64/bin/javac   1081      modo manual

Pulse <Intro> para mantener el valor por omisión [*] o pulse un número de selección:

    If you want to keep the java version of your system independent from the one used by eclipse you can make use of this configuration parametereclipse.ini :

    -vm
/usr/lib/jvm/java-7-oracle-amd64/bin/java

    Just add it to the file eclipse.inijust before the line containing the parameter -vmargs:

    -startup
plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.100.v20110505
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vm
/usr/lib/jvm/java-7-oracle-amd64/bin/java
-vmargs
-Xms40m
-Xmx384m

    When you load Eclipse next time it will use that jvm to start the program:

    $ ps -ef | grep java
... /usr/lib/jvm/java-7-oracle-amd64/bin/java -Xms40m -Xmx384m -XX:MaxPermSize=256m -jar <ruta>/eclipse//plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar -os linux -ws gtk -arch x86_64 -showsplash -launcher <ruta>/eclipse/eclipse -name Eclipse --launcher.library <ruta>/eclipse//plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.100.v20110505/eclipse_1407.so -startup <ruta>/eclipse//plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar --launcher.overrideVmargs -exitdata e78023 -vm /usr/lib/jvm/java-7-oracle-amd64/bin/java -vmargs -Xms40m -Xmx384m -XX:MaxPermSize=256m -jar <ruta>/eclipse//plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
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