Getting error message Exception in thread "main" java.lang.NoClassDefFoundError: sun/misc/Resource

 I'm trying to run idea-IU-111.277 in Linux 

In /opt/idea-IU-111.277/bin/idea.sh , I set 

IDEA_JDK="/opt/jdk-9.0.4"

Then I run idea.sh from the command prompt 

:/opt/idea-IU-111.277/bin$ ./idea.sh
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)
Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0
Exception in thread "main" java.lang.NoClassDefFoundError: sun/misc/Resource
at com.intellij.util.lang.ClassPath.getLoader(ClassPath.java:207)
at com.intellij.util.lang.ClassPath.getLoader(ClassPath.java:172)
at com.intellij.util.lang.ClassPath.getResource(ClassPath.java:138)
at com.intellij.util.lang.UrlClassLoader.findClass(UrlClassLoader.java:70)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:563)
at com.intellij.util.lang.UrlClassLoader.loadClass(UrlClassLoader.java:85)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:375)
at com.intellij.ide.Bootstrap.main(Bootstrap.java:40)
at com.intellij.ide.Bootstrap.main(Bootstrap.java:34)
at com.intellij.idea.Main.main(Main.java:92)
Caused by: java.lang.ClassNotFoundException: sun.misc.Resource
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
... 12 more
VAW70:/opt/idea-IU-111.277/bin$

Does this version of IDEA only support JDK 1.6? Or is something else wrong 

Is there a newer version of IDEA that I need to upgrade to? so that it supports JDK 1.9 , or is something else wrong. 

I appreciate your help.