How to Install Eclipse 4.7 Oxygen on CentOS 7

After extracting archive file use alternatives command to install it.

[root@linuxhelp ~]# cd /usr/local/jdk-9.0.4/
[root@linuxhelp jdk-9.0.4]# alternatives --install /usr/bin/java java /usr/local/jdk-9.0.4/bin/java 2

And then, you need to configure it.

[root@linuxhelp jdk-9.0.4]# alternatives --config java
There are 2 programs which provide ' java' .

Selection    Command
-----------------------------------------------
*+ 1           java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.131-11.b12.el7.x86_64/jre/bin/java)
2           /usr/local/jdk-9.0.4/bin/java

Enter to keep the current selection[+], or type selection number: 2

At this point, JAVA 9 has been successfully installed on your system. We also recommend to setup javac and jar commands path using alternatives commands in the following manner.

[root@linuxhelp jdk-9.0.4]# alternatives --install /usr/bin/jar jar /usr/local/jdk-9.0.4/bin/jar 2
[root@linuxhelp jdk-9.0.4]# alternatives --install /usr/bin/javac javac /usr/local/jdk-9.0.4/bin/javac 2
[root@linuxhelp jdk-9.0.4]# alternatives --set jar /usr/local/jdk-9.0.4/bin/jar
[root@linuxhelp jdk-9.0.4]# alternatives --set javac /usr/local/jdk-9.0.4/bin/javac

And once it is done, you need to check the installed version.

[root@linuxhelp jdk-9.0.4]# java -version
java version " 9.0.4" 
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)

Once it is done, you need to setup JAVA_HOME Variable as an environment variable.

[root@linuxhelp jdk-9.0.4]# export JAVA_HOME=/usr/local/jdk-9.0.4

You should also create a PATH Variable.

[root@linuxhelp jdk-9.0.4]# export PATH=$PATH:/usr/local/jdk-9.0.4/bin

Now, you can go on board with the download of Eclipse. You can do that from its official site: https://www.eclipse.org/downloads/eclipse-packages/?osType=linux& release=undefined

Once the file is downloaded, you need to extract the archive.

[root@linuxhelp Downloads]# tar -zxvf eclipse-jee-oxygen-2-linux-gtk-x86_64.tar.gz -C /usr/local/
eclipse/
eclipse/p2/
eclipse/p2/org.eclipse.equinox.p2.engine/
eclipse/p2/org.eclipse.equinox.p2.engine/profileRegistry/
eclipse/p2/org.eclipse.equinox.p2.engine/profileRegistry/epp.package.jee.profile/
eclipse/p2/org.eclipse.equinox.p2.engine/profileRegistry/epp.package.jee.profile/1513587876936.profile.gz
eclipse/p2/org.eclipse.equinox.p2.engine/profileRegistry/epp.package.jee.profile/.lock
eclipse/p2/org.eclipse.equinox.p2.engine/profileRegistry/epp.package.jee.profile/.data/
.
.
eclipse/configuration/org.eclipse.equinox.simpleconfigurator/bundles.info
eclipse/configuration/config.ini
eclipse/configuration/org.eclipse.update/
eclipse/configuration/org.eclipse.update/platform.xml

Now, for configuration, you need to create an eclipse binary symbolic link to make it accessible system-wide.

[root@linuxhelp Downloads]# ln -s /usr/local/eclipse/eclipse /usr/bin/eclipse

[root@linuxhelp Downloads]# vim /usr/share/applications/eclipse.desktop

[Desktop Entry]
Name=Eclipse
Comment=Eclipse IDE
Type=Application
Encoding=UTF-8
Exec=/usr/bin/eclipse
Icon=/usr/local/eclipse/icon.xpm
Categories=GNOME Application Development 
Terminal=false
StartupNotify=true
~                                                                         
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" /usr/share/applications/eclipse.desktop"  10L, 212C     10,1          All