[Exist-development] eXist 3.0 installation exception: Unsupported major.minor version 52.0

[Masoud V. <ma...@gm...>]

Hi all;
I am trying to install eXist-db 3.0 on Centos 7 with oracle java 8, but at
the end of installation, below exception will throw:

java -jar /home/masoud/eXist-db-setup-3.0-acd0c14.jar
Select target path [/opt]
/home/exist/eXist3.0
press 1 to continue, 2 to quit, 3 to redisplay
1
Set Data Directory
Please select a directory where eXist-db will keep its data files. On
Windows, this should be outside the 'Program Files' directory. Please make
sure eXist can write to the directory it is installed in.
Data dir:  [webapp/WEB-INF/data]

press 1 to continue, 2 to quit, 3 to redisplay
1
Set Admin Password and Configure Memory
Enter password:  []

Enter password:  []

------------------------------------------

Maximum memory in MB: [2048]

Cache memory in MB: [256]

press 1 to continue, 2 to quit, 3 to redisplay
1
[ Starting to unpack ]
[ Processing package: Sources (1/15) ]
[ Processing package: Core (2/15) ]
[ Processing package: Apps (3/15) ]
[ Processing package: shared (4/15) ]
[ Processing package: bf-XForms (5/15) ]
[ Processing package: dashboard (6/15) ]
[ Processing package: demo (7/15) ]
[ Processing package: doc (8/15) ]
[ Processing package: eXide (9/15) ]
[ Processing package: fundocs (10/15) ]
[ Processing package: markdown (11/15) ]
[ Processing package: monex (12/15) ]
[ Processing package: xqjson (13/15) ]
[ Processing package: xsltforms (14/15) ]
[ Processing package: xsltforms-demo (15/15) ]
[ Unpacking finished ]
[ Starting processing ]
Starting process Setting admin password ... (1/1)
Exception in thread "main" java.lang.UnsupportedClassVersionError:
org/exist/start/Main : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
[ Console installation done ]

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)

uname -a
Linux foo 3.10.0-327.28.3.el7.x86_64 #1 SMP Thu Aug 18 19:05:49 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux

please help.
thanks