We Keep Coding

Pointing eclipse to JRE 1.7 instead of 1.6

I am getting error whenever I click eclipse icon that version 1.6 of the jvm is not suitable for this product. Version 1.7 or greater is required.
My other java applications in the system are using JRE 1.6 so I dont want to change that.
I have JDK 7 in my system as well but how can I point my eclipse to JDK 1.7 instead of default 1.6.
Thanks

You have several options.
Since you want to default to Java 1.6 for most of your other applications, I'd suggest modifying your Eclipse.ini:
https://wiki.eclipse.org/Eclipse.ini
EXAMPLE:
-startup
plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.100.v20110502
-product
org.eclipse.epp.package.java.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vm
C:\Java\JDK\1.8\bin\javaw.exe
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms40m
-Xmx1024m

Eclipse won't start(no error message)

I installed jdk1.7.0_79 and Eclipse for Java EE 64 bit.
When trying to run Eclipse I got the following error: Java was started but returned exit code=1
I followed this solution: Eclipse returns error message "Java was started but returned exit code = 1"
Now, there is no error, but Eclipse isn't starting.
I tried all things said here: https://wiki.eclipse.org/Eclipse.ini#Specifying_the_JVM, but when I try the other two options(\bin\javaw.exe, \jre\bin\java.exe), I get error code=1 error.
When I try to set it to \jre\bin\server\jvm.dll Eclipse won't start, and nothing shows up.
I tried reinstalling java and it didn't work.
Edit: I also tried adding -XX:-UseCompressedOops in eclipse.ini, but that didn't work either
Eclipse.ini content:
-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.jee.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
1024M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
1024m
--launcher.defaultAction
openFile
--launcher.appendVmargs
-XX:-UseCompressedOops
-vm
C:\Program Files\Java\jre7\bin\server\jvm.dll
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Xms1024
-Xmx1024m

Eclipse Not Working

Actually I downloaded the Android SDK from their site it was a bundle for android development and it was working fine. Then I downloaded the Netbeans from Java official site. It said it requires JDK7 so I downloaded that too. Now the Net Beans is working fine but eclipse displays this really long message box saying that Java was started but returned exit code 1 and then followed by some gibberish
My eclipse configuration file has the following text in it:
-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20120913-144807
-product
com.android.ide.eclipse.adt.package.product
--launcher.XXMaxPermSize
256M
-showsplash
com.android.ide.eclipse.adt.package.product
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Xms40m
-Xmx768m
-Declipse.buildId=v22.3.0-887826
-XX:MaxPermSize=512M

Add '-XX:-UseCompressedOops' to the eclipse.ini

Regarding slow performance of eclipse

I am using eclipse 3.7 indigo , the issue that I am facing is when I start my eclipse my machine gets too slow even the eclipse get hang some times in between , the settings of my eclipse.ini file is below..
-startup
plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.100.v20110502
-product
org.eclipse.epp.package.jee.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms40m
-Xmx512m
please advise how to overcome from this..!!

Change this values to the higher ones:
--launcher.XXMaxPermSize 256m
-Xms40m
-Xmx512m

Perhaps this will help? I mean, I don't know the specs of the machine you're on, but this is nice on less powerful machines.
What are the best JVM settings for Eclipse?

Check with the eclipse.ini file and add the following java parameters and values.
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Xmn128m
-Xms1024m
-Xmx1024m
-Xss2m
-XX:PermSize=256m
-XX:MaxPermSize=256m
-XX:+UseParallelGC
This worked for me. Might help.

Eclipse -vm option trouble

I'm having trouble setting up a new eclipse installation with the -vm option. I'm using the eclipse.ini file below (which has worked in the past). I need this for the m2eclipse plugin. Currently, if I include the -vm option eclipse fails to start.
Any idea what the problem is with this?
-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
C:\Program Files\Java\jdk1.6.0_20\bin\javaw.exe
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
-vmargs
-XX:PermSize=256m
-XX:MaxPermSize=512m
-Xms128m
-Xmx1024m

Are you using a 64bit version of Eclipse with a 32bit JVM?

I'm guessing its the space in the Program Files part of the path. The below example works fine for me. Can you try to install the JDK in c:/apps and see if the script below works for you?
-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
C:/apps/jdk1.6.0_15/bin/javaw.exe
-product
org.eclipse.epp.package.java.product
--launcher.XXMaxPermSize
256M
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
-vmargs
-server
-Dosgi.requiredJavaVersion=1.5
-Xms1200m
-Xmx1200m