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Operating Systems Linux Fedora Fedora: Uninstall Java JDK 1.8 and install Oracle Java 1.7.15 Post 303009957 by Peasant on Friday 22nd of December 2017 11:59:23 PM
Old 12-23-2017
No need to uninstall anything.

Install the required oracle java using rpm.
Using alternatives command as superuser one can change the default java used.

Bare in mind, that perhaps some programs on the system rely on open java, so above change could affect those.

One could also download only required oracle java as compressed archive with all binaries and libraries required.
Create a user on the system which will utilize that java environment.
Unpack the archive under /opt/orajava (for instance)
As root, chown /opt/orajava to user created.
Setup required java options in user home directory profile file (JAVA_HOME etc.)
Configure kernel parameters for that user, depending on the application requirements/load (if applicable, defaults are often ok).

Above setup will have no effect on the system other then running new processes/code (load) under user created above and consuming disk space required.

Hope that helps
Regards
Peasant.
 

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jpackage-utils(7)						RPM Java packaging						 jpackage-utils(7)

NAME
jpackage-utils - Utilities, macros and other files for the JPackage Project <http://www.jpackage.org/>: SYNOPSIS
build-classpath build the Java classpath in a portable manner build-jar-repository build a jar repository in a portable manner rebuild-jar-repository rebuild a jar repository in a portable manner (after a jvm change...) build-classpath-directory build the Java classpath from a directory diff-jars show jar content differences jvmjar install jvm extensions create-jar-links create custom jar links clean-binary-files remove binary files from sources check-binary-files check for presence of unexpected binary files DESCRIPTION
The JPackage Project has two primary goals: - To provide a coherent set of Java software packages for Linux, satisfying all quality requirements of other applications. - To establish an efficient and robust policy for Java software packaging and installation. We focus on free and open source software whenever possible. For convenience, we also provide non-free packages without the restricted source code. Our RPMs are generic in that they should work on any RPM based Linux distribution (Mandriva, Red Hat, SuSE, others). Other packaging format suggestions are welcome too. FILES
/use/share/java-utils/java-functions shell script functions library for Java applications /etc/java/jpackage-release string identifying the currently installed JPackage release /etc/java/java.conf system-wide Java configuration file ~/.java/java.conf user's Java configuration /etc/rpm/macros.jpackage RPM macros for Java packagers and developers SEE ALSO
Regular Manual Pages build-classpath(1) build-classpath-directory(1) build-jar-repository(1) check-binary-files(1) clean-binary-files(1) create-jar-links(1) diff-jars(1) find-jar(1) jvmjar(1) rebuild-jar-repository(1) rebuild-security-providers(1) java.conf(5) Documentation Following files are located in your standard documentation directory HEADER.JPP A standard header with license for spec files of JPackage Project clean-binary-files.txt A further documentation for check-binary-files(1), clean-binary-files(1) and create-jar-links(1) commands httpd-javadoc.conf Example JPackage javadoc configuration snippet for Apache jpackage-1.5-policy.xhtml JPackage Java infrastructure design and packaging policy jpackage-utils-policy JPackage packaging (naming) policy AUTHOR
Written by the JPackage Project REPORTING BUGS
Report bugs using JPackage Bugzilla (http://www.jpackage.org/bugzilla/) jpackage-utils 1.7.5 February 2009 jpackage-utils(7)
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