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Source Compatibility Issues in Eclipse STS with Java 9

I updated my system to run off of Java 9 primarily and my spring projects are also supporting Java 9. I have an issue however with my Spring Tool Suite (Eclipse 4.7.2) where the program is saying that my code is incompatible with my source level compatibility settings and must be JRE 1.5 and up (parameterized types for example).
In my Project properties my Compiler Compliance Level and Source Compatibility is set to '9'.
In my Window->Preferences, I have set my checked installed JRE to the location of my Java jdk-9.0.1 folder.
Here is my sts.ini (eclipse.ini) file:
STS.ini
-startup
plugins/org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.551.v20171108-1834
-product
org.springsource.sts.ide
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.8
--add-modules=ALL-SYSTEM
-Xms40m
-Dosgi.module.lock.timeout=10
-Xverify:none
-Dorg.eclipse.swt.browser.IEVersion=10001
-Xmx768m
--launcher.appendVmargs
-vm
C:\Program Files\Java\jdk-9.0.1\bin\javaw.exe
-vmargs
-Dosgi.requiredJavaVersion=1.8
--add-modules=ALL-SYSTEM
Any help solving this problem would be greatly appreciated.

The JVM that you specify in your STS.ini is not related in any way to the projects and their compiler levels in your workspace. You can easily run STS on top of a JDK8 and still have projects in your workspace that compile for Java9.
In order to compile projects against a certain level, you have to have a related JDK configured in your preferences. Sounds like that you said that you did that already. There is also a sub-section called "Execution Environment", where you can specify which JDK on your machine should be used for which Java language level. Make sure that you have the right JDKs selected there.

Your STS.ini looks broken: there should be only a single -vmargs section; -vm and --launcher.appendVmargs must be above -vmargs:
Remove the last three lines (which are duplicated lines) and move --launcher.appendVmargs, -vm and the following line above -vmargs:
-startup
plugins/org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.551.v20171108-1834
-product
org.springsource.sts.ide
--launcher.defaultAction
openFile
--launcher.appendVmargs
-vm
C:\Program Files\Java\jdk-9.0.1\bin\javaw.exe
-vmargs
-Dosgi.requiredJavaVersion=1.8
--add-modules=ALL-SYSTEM
-Xms40m
-Dosgi.module.lock.timeout=10
-Xverify:none
-Dorg.eclipse.swt.browser.IEVersion=10001
-Xmx768m

For those who come across the same issue in the future: I solved the issue, but neither of the previously posted corrected the issue (although they were helpful). I followed the steps here and added the '-clean' line to my sts.ini file and restarted eclipse.

Can't Open Eclipse "No Java virtual machine was found"

I've checked the other relative common posts to mine but they a slight difference that didn't give me the solution I needed:
A Java Runtime Environment (JRE) or Java Development Kit (JDK) must be available in order to run Eclipse. No Java virtual machine was found after searching the following locations:
C:\Program Files (x86)\Java\jdk1.80_25\jre\bin\javaw.exe
I have checked over and over in that path, and javaw.exe is definitely there. Any ideas what to do, I had a exit-13 problem before I followed a step to add
"-vm "path to javaw.exe" in my eclipse.ini but I don't know what to do now.
My eclipse.ini file:
-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20140415-2008.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20150204-1316
-product
org.eclipse.epp.package.cpp.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vm
C:\Program Files (x86)\Java\jdk1.8.0_25\jre\bin\javaw.exe
--launcher.appendVmargs
-vmargs
-Dosgi.requiredJavaVersion=1.7
-Xms40m
-Xmx512m

Got it to work, uninstalled all my Java's, reinstalled jdk (x86) in my case, installed newest jre (x64) to delete obsolete ones from the jdk and it worked. THanks everyone

-vm
C:\Program Files (x86)\Java\jdk1.8.0_25\jre\javaw.exe
should be something like
-vm
C:/Program Files (x86)/Java/jdk1.8.0_25/
or even better:
-vm
C:/Program Files (x86)/Java/jre1.8.0_25/bin/server/jvm.dll
On a side note, download the 64bit version if you can

The potential problem is you are using 64 bit Eclipse but 32 bit java. Either use 32 bit eclipse or install 64 bit java and re-try. It all started with Java 7!

Just copy this file:
C:/Program Files/Java/jre(5,6,7...whatever version)/bin/javaw.exe
to the Eclipse folder (directory where the eclipse.exe is located)
Please note: Only tested for Windows

Alternatively, right click on Eclipse icon, select Properties and edit Target field.
There will be a large string, edit it to point to correct javaw.exe path:
-vm "c:/Program Files/Java/jdk1.8.0_65/bin/javaw.exe"

JVM requirements incompatible error

I have following Java installed:
Java 32 bit
Java 64 bit
I have eclipse-standard-kepler-SR2-win32-x86_64 installed in my Windows 7 64 bit pointing to jdk1.8.0_05.
When trying to install IBM software packages (IBM Rational Team Concert Client) using IBM Installation Manager, it gives below error:
The JVM requirements of the package are incompatible with the JVM java
version "1.8.0_05" used by the existing Eclipse IDE
This is my eclipse.ini:
-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20130327-1440.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20140116-2212
-product
org.eclipse.epp.package.standard.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
--launcher.appendVmargs
-vm
C:\Program Files\Java\jdk1.8.0_05\bin
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Xms40m
-Xmx512m
What thing that I have misinstalled?

The RTC Eclipse client requirement page mentions Eclipse 3.6.x and 4.2.x (Juno) as compatible Eclipse clients.
Kepler (Eclipse 4.3.x) will be for RTC 5.x only.
(Note: accessing the jazz.net wiki requires a jazz.net account: you have to create one, it is free)
That being said, with the latest RTC 4.x, you can try the process described in this thread which could work even for Juno (4.3):
Download an Eclipse release from http://www.eclipse.org/downloads/packages/release/juno/sr2
Extract the Eclipse release to c:\tools\eclipse
Extend Eclipse by adding a remote update site with the RTC p2repo from ...\RTC\4.x\RTC-Client-p2Repo-4.x.zip
When Eclipse has restarted shift to the Jazz Admin perspective
The RTC-Client-p2Repo-4.x.zip file is available on the RTC "all downloads" page, like for instance:
https://jazz.net/downloads/rational-team-concert/releases/4.0.6?p=allDownloads

You can edit eclipse.ini file like following for java 1.8
openFile
--launcher.appendVmargs
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Xms40m
-Xmx512m

The installation doesn't matter as much as your Environment Path location for Java Compiler.
Try doing a Clean install and stick to the 32 bit installations. I have had issues with 64bit JDK installations.

Exit code=127 when I start Eclipse

I've installed Ubuntu 10.10, Eclipse Juno and Java 1.7.
Firstly, when I tried to start Eclipse, this last one said me that it doesn't exist a java runtime environment on my computer. So, I've created in the Eclipse directory deux others directory(jre/bin) within I put all the files from the bin directory of java.
After, When I started, I had this following errors :
JVM terminated. Exit code=127
/home/dark0502/Desktop/eclipse/jre/bin/java
-Dosgi.requiredJavaVersion=1.5
-Dhelp.lucene.tokenizer=standard
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m
-jar /home/dark0502/Desktop/eclipse//plugin/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
-os linux
-ws gtk
-arch x86
-showsplash /home/dark0502/Desktop/eclipse//plugins/org.eclipse.platform_4.2.2.v201302041200/splash.bmp
-launcher /home/dark0502/Desktop/eclipse/eclipse
-name Eclipse
--launcher.library /home/dark0502/Desktop/eclipse//plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.200.v20120913-144807/eclipse_1502.so
-startup /home/dark0502/Desktop/eclipse//plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.overrideVmargs
-exitdata 248015
-product org.eclipse.epp.package.java.product
-vm /home/dark0502/Desktop/eclipse/jre/bin/java
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Dhelp.lucene.tokenizer=standard
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m
-jar /home/dark0502/Desktop/eclipse//plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar `
Do you have a solution ?
Thank you

Searching the net, it seems it was already reported:
http://www.linuxquestions.org/questions/linux-software-2/eclipse-juno-start-up-error-127-a-4175418488/
And the solution suggested was:
I figured it out. I installed JDK7 and was under the impression that
it would also install JRE with it. Whenever I went to anything that
used Java it said it was using 7 so I assumed it must have. I guess
the difference between the JDK and the JRE installed caused it to not
work

Eclipse Indigo typing lag on OS X Lion

I am working on a fairly large project and have recently bumped into the good old friend of mine from the 90's, typing lag.
My setup is MacBook Pro 2.2 GHz i7 8GB with SSD drive and it hasn't had any serious performance issues so far.
I have increased the memory allocations to -Xmx1024m and -XX:MaxPermSize=512m. There is no heavy use of plugins involved. Also, this only happens on .java files in the default editor.
What could be the problem?
EDIT:
I found the problem. I noticed that the problem occurred only when editing large java files. In my case the class had 1800 rows.
It's weird though, since I am not facing the same problem with the same eclipse setup on Ubuntu. It seems like Eclipse on Mac just can't handle java files that big I was editing.
Any suggestions?
EDIT2:
I am using the Eclipse Indigo for Java EE with the latest updates (3.7.1.X)
Installed plugins:
m2eclipse
MercurialEclipse aka HGE (1.9.1 from the official eclipse update site)
Subclipse (installed, but not used in the workspace where the typing lag occurs)
ADT (installed, but not used in this project)
All plugins are installed via Eclipse marketplace and are updated to the latest release unless stated otherwise.

Try altering the settings in your eclipse.ini file. This contain the settings for the JVM and can help reduce memory issues like this.
Example eclipse.ini:
-data
../../workspace
-showlocation
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
384m
-startup
plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.0.200.v20090519
-vm
../../../../program files/Java/jdk1.6.0_17/jre/bin/client/jvm.dll
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms128m
-Xmx384m
-Xss4m
-XX:PermSize=128m
-XX:MaxPermSize=384m
-XX:CompileThreshold=5
-XX:MaxGCPauseMillis=10
-XX:MaxHeapFreeRatio=70
-XX:+UseConcMarkSweepGC
-XX:+CMSIncrementalMode
-XX:+CMSIncrementalPacing
-Dcom.sun.management.jmxremote
-Dorg.eclipse.equinox.p2.reconciler.dropins.directory=C:/jv/eclipse/mydropins
Detailed in this question and this question.

Jivings was right about the root of the problem being in the eclipse.ini file.
I am not sure what I have actually changed in the eclipse.ini after messing around with the it, since the TimeMachine does not seem to be able to save a backup of the .ini file inside the Eclipse application package (Eclipse/Contents/MacOS/eclipse.ini).
I actually lowered the MaxPermSize and other memory values which made Eclipse run smoother. If anyone else is encountering the same problem, I suggest you try similar values and see if that works. If it doesn't, I also read that you can start eclipse once with the -clean argument, which cleans up some installation and usage history among other things. I did not do that, but it's worth a try.
The following is my current configuration, and it works pretty well:
-startup
../../../plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
--launcher.library
../../../plugins/org.eclipse.equinox.launcher.cocoa.macosx.x86_64_1.1.100.v20110502
-product
org.eclipse.epp.package.jee.product
--launcher.defaultAction
openFile
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.5
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m
-Xdock:icon=../Resources/Eclipse.icns
-XstartOnFirstThread
-Dorg.eclipse.swt.internal.carbon.smallFonts