Registry Key has value 1 7 but 1 6 is required Java 1 7 is Installed and the Registry is Pointing to it

Question

My development team recently was forced over to a remote development environment where we do not have full access to the servers   Before the change over we had a JAR that was running fine on Java 1 7 x64 along with JRE 7   When we moved over to the new server our JAR was running alright  but then one of the server admins  updated  our Java to an older version and uninstalled the one we were using   Don t ask me why  I don t know   I re-installed Java 1 7 and uninstalled 1 6 along with the JREs   The following problem occurs at runtime  there are no build errors   Registry key  Software JavaSoft Java Runtime Environment CurrentVersion  has value  1 7   but  1 6  is required  Error  could not find java dll Error  could not find Java SE Runtime Environment    I ve run the same JAR on my laptop with no issues   Both the server and my laptop have JDK 1 7 and JRE 7 in the respective  HOME  variables and system PATH   I ve even reinstalled JRE 6 and placed it later in the system environment PATH variables with the same result   I have also changed the registry back to look at 1 6 and it results in the following  which I looked up and it appears to be from having multiple Javas installed  leading back to my original problem    Exception in thread  main  java lang UnsupportedClassVersionError        Unsupported major minor version 51 0   I would appreciate any insight you all have as I have been looking over various forums but nothing seems to have exactly my problem   Also  this has happen on another server we are using as well   Thanks   Update  No luck with recompiling the JAR to either 1 6 or 1 7 and matching the JDK   Also  why in the world would a newer version of Java break an older compiled version

User · Answer

Using regedit  remove the entries corresponding to java 7  It will work

User · Answer

I ve deleted java files at windows system32 and I also have removed c  ProgramData Oracle Java javapath from the PATH variable  because there was 3 symlinks to java 1 8 files   I had JDK 1 7 in the  JAVA HOME  variable and java1 7 bin in the PATH   PS1  My problem was between Java 1 7 and Java 1 8    PS2  I can t add this as a comment to Victor s answer because I haven t enough points

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Change to directory with correct java exe i e  go to the required JDK version java exe  cd C  Program Files Java jdk1 7 0 25 bin   Run the java exe from this directory  it has precedence over registry and  PATH settings   java -jar C  installed selenium-server-standalone-2 53 0 jar

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I don t know if anyone is still following this thread  but I recently had this issue when I tried to launch ActiveMQ 5 10 as a Windows service   I didn t have a JAVA HOME path set  I had Java 6 and Java 7 installed  but the default version was v7   ie if I opened a command window and types  java -version     This is where the clue was -  java -version  returned  Java HotSpot TM  64-Bit Server VM  build 23 1-b03  mixed mode   but I was had installed the Win32 service     It turns out that if you use the Win32 wrapper on a 64-bit machine it somehow decides to use a different version of Java     So my fix was to uninstall the 32-bit version of the wrapper and install the 64-bit version  aversion on my machine  just habit I guess    But luckily I resolved the issue eventually

User · Answer

I solved this problem by uninstalling Java 1 8

User · Answer

This happens when you somehow confused java itself  You are trying to run a java 6 VM where it found a JRE 7  It might show this problem even if you type in the command line just java or java -version in a misconfigured environment  The JAR is not the problem  except in the very unlikely case where the code in JAR is looking in the Windows Registry for that  which probably is not your case    In my case  I had the java exe  javaw exe and javaws exe from Java 6 in the Windows System32 folder  don t know how it got to be there   The rest of the JDK and JRE where found in the PATH inside C  Java jdk 1 7 0 bin  Oops

User · Answer

Just had the similar error when installing java 8  jdk  amp  jre  on a system already running Java 7   Error  Registry key  Software JavaSoft Java Runtime Environment  CurrentVersion  has value  1 8   but  1 7  is required  Error  could not find java dll Error  Could not find Java SE Runtime Environment   My environment was set up correctly  Path  amp  java home correctly defined   but the problem arises from the way pre-8 Java installers worked  which is that they used to copy the three executables  java exe  javaw exe  amp  javaws exe  to the Windows system directory   These remain unless overwritten by a new pre-8 installation  However the Java 8 installer instead creates symbolic links in a new directory  C  ProgramData Oracle Java javapath  pointing to the actual JRE 8 location  This means that you ll actually run the old 7 exes but use the new 8 DLLs  So  the solution is simply to delete the 3 Java exes  as above  from the windows system directory  If you are running 32-bit Java on a 64-bit Windows  the exes would be in Windows SysWOW64  otherwise in Windows System32

User · Answer

For my Win7  Paradox was in being java exe and javaw exe in System32 folder  Opening that folder I couldn t see them but using search in Start menu I get links to those files  removed them  Next searsh gave me links to files from JAVA HOME  magic

User · Answer

In the START menu type  regedit  to open the Registry editor  Go to  HKEY LOCAL MACHINE  on the left-hand side registry explorer tree menu  Click  SOFTWARE  within the  HKEY LOCAL MACHINE  registries  Click  JavaSoft  within the  SOFTWARE  registries  Click  Java Runtime Environment  within the  JavaSoft  list of registries here you can see different versions of installed java  Click  Java Runtime Environment - On right hand side you will get 4-5 rows   Please select  CurrentVersion  and right Click  select modify option  Change version to  1 7   Now the magic has been completed

User · Answer

The jar was compiled to be 1 6  compliant   That is why you get this error   Two resolutions  1  Use Java 1 6    OR    2   Recompile the jar to be compliant for your environment 1 7

[jar] Registry Key '...' has value '1.7', but '1.6' is required. Java 1.7 is Installed and the Registry is Pointing to it

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