Why am I not able to get javac -version? - java

i have C:\Program Files\Java\jre1.8.0_102 and C:\Program Files\Java\jre7
and C:\jdk1.8.0_121 and in command prompt , java -version giving java version 1.8.0_102 that is fine. but when I type javac -version , it giving javac.exe not compatible with your windows. But no problem in other systems with same jdk and windows. please do help

javac.exe not compatible with your windows
Sounds like you've downloaded 64 bit JDK into C:\ but you're running 32bit Windows
The JRE does not contain javac, therefore the JDK is the problem
After you get a good version of Java, you'll need to fix your PATH variables

32 bit Windows on which a 32 bit JRE was already installed. You now tried to install a 64 bit JDK on it as well, which doesn't work.
The 32 bit JRE is still there, and as some installers will put java.exe and some others in your Windows installation (windows/system32 for example) they will get picked up instead of the JRE/JDK you just installed, even if you added that one to the system path as well.
That's why you're still seeing a correct response from java -version but not from javac -version, as javac.exe isn't copied there.
Remove the java*.exe from your windows installation, install a 32 bit JDK, set your JAVA_HOME correctly, and add %JAVA_HOME%\bin to your system path.
And oh, best not install a JDK to a place with spaces in the path, some versions don't like that.

Find out you set your environment variable correctly.
set JAVA_HOME=C:\jdk1.8.0_121
and entry to path -> %JAVA_HOME%\bin

Related

How to fix error: could not find the required version of the Java(TM) 2 runtime environment in '(null)'

I have researched this and none of the solutions that I have seen have fixed my error.
What is happening is I tried to install Java EE version got the above error and then found out that I must install Java SE first. So I installed Java SE and set the JAVA_HOME variable to C:\Program Files\Java\jdk1.8.0 which is where I installed my JDK. I also put C:\Program Files\Java\jdk1.8.0\bin in my PATH variable. Still not working. I also tried the JAVA_HOME variable with C:\Program Files\Java\jdk1.8.0\bin and that didn't work. I also tried installing without the PATH variable being updated to where I put my JDK.
I'm really getting confused as to why this is happening. I've had Java before and I don't recall having this much trouble installing it.
PS I don't install from the command line I just click the download icon in Firefox and then click the download.
Try running the installer at your commandline and pass the path of the JRE instead of the JDK.
For Example:
java_ee_sdk7-windows.exe -j "C:\Program Files\Java\jre8"
I had the exact same problem and even downloading the version without JDK didn't help!
I simply installed it from the terminal with passing the JRE For Example:
java_ee_sdk7-windows.exe -j "C:\Program Files\Java\jre7"
and it worked like a charm!
I had the same problem but an additional step was required in order to install using the command line. In the command window (on my Windows 10 laptop) I had to use:
cmd /d
to tell the cmd window to ignore registry AutoRun commands before the java installation executable would run. After using cmd /d, and changing to the directory where the .exe file was at, the following worked:
java_ee_sdk-6u4-jdk7-windows-x64.exe -j "%JAVA_HOME%"
Where JAVA_HOME is a system environment variable pointing to an existing JDK installation (C:\Program Files\Java\jdk1.8.0_65).
Uninstall everything, all of it.
Then go to your Program Files folder (and (x86) folder if on a 64bit Windows) and physically remove any Java folders.
Reinstall Java SE and then the EE packages. Sometimes Windows appears to get a bit confused and you need to help it figure out what to do.
If you want to uninstall, go to the glassfish folder and open the command prompt, then type:
uninstall.exe -j <The path to your JRE>
These points may be helpful.
java EE SDK7 contains glassfish v4.0 and it compatible with JDK6 and JDK7.
java EE SDK8 contains glassfish v5.0, it compatible with only JDK7 and JDK8, not JDK 9 or beyond.
So environment variable JAVA_HOME has to point to the root directory of one of the mentioned JDK. and %JAVA_HOME%\bin should be added to environment variable path
Despite having followed all of the above, setup of java EE SDK7 gets error:
could not find the required version of the Java(TM;
as Bakudan and laf8 said,
open cmd using run, with /d /a options as followed.
cmd /d /a
and next run SDK7-setup with -j option like this command
sdk7.exe -j "%JAVA_HOME%"
note that %JAVA_HOME% enclosed BY ""
This was happening to me when I tried to run the Java EE installer. What I did, was to download from Oracle a Java EE version which didn't include the JDK, because it was already installed in my system. Problem solved!
Open regedit.
goto :HKEY_LOCAL_MACHINE\Software\JavaSoft\Java Runtime Environment\
set CurrentVersion to desired JDK version.
Check JavaHome and RuntimeLib path's for selected jdk version folder
Check JavaHome and RuntimeLib path's for selected jdk version folder
example: "HKEY_LOCAL_MACHINE\Software\JavaSoft\Java Runtime Environment\1.7".
example:
JavaHome=C:\Program Files (x86)\Java\jdk1.7.0_79
RuntimeLib=C:\Program Files (x86)\Java\jdk1.7.0_79\jre\bin\server\jvm.dll
Source: http://tech-read.com/2009/05/19/how-to-solve-error-could-not-find-java-runtime-2-environment-while-opening-an-ide/

Java default version doesnt reflect after PATH change

I am running currently on Java 1.7.0_17 64bit version and I want to launch an app using Java 32 bit version.
I updated PATH variable to point to (C:\Program Files (x86)\Java\jre7\bin) Java 32 bit version. Then did a java -version it still shows the 64bit version.
I gave up and tried to do a java -d32 -jar abc.jar and then it gives me an
java -d32
Error: This Java instance does not support a 32-bit JVM.
Please install the desired version.
Please let me know how can the system refresh the latest Java settings done in the PATH variable.
There is probably a java.exe in your C:\WINDOWS\System32\ folder leftover from the previous installation. Replace it with the one in C:\Program Files (x86)\Java\jre7\bin.

Eclipse - Failed to load the JNI shared library

Every time I try to start Eclipse, it says
Failed to load the JNI shared libraby
"C:\Program Files (x86)\Java\jre7\bin\client\jvm.dll"
I have no clue why this happens, because I reinstalled JDK, JRE and Eclipse multiple times. All the 64 bit version (I've got Windows 7 64 bit)
Alright, it somehow worked using the 32 Bit version of Eclipse...
If you have installed all 64 bit version of Eclipse and JDK, you can check your system environment variable. Probably you set on old JAVA_HOME path pointing to
"C:\Program Files (x86)\Java"
I had the same problem: in my case everything was in fact 64-bit - 64-bit OS, 64-bit Eclipse and 64-bit JRE in use, so there was some confusion as to the origins of the issue...
What helped was correcting environmental variables JAVA_HOME and PATH - and pointing them directly to
.../My/Java/Location/bin
instead of
.../My/Java/Location
If eclipse is 32bit
then, eclipse.ini file
specify -vm C:\Program Files (x86)\Java\jre\bin\javaw.exe
If eclipse is 64bit
then, eclipse.ini file
specify -vm C:\Program Files\Java\jdk\jre\bin\javaw.exe
Summary: specify compatible java version path ( 32 bit or 64 bit ).
-vm %JAVA_HOME%\jre\bin\javaw.exe
Just try to download this if you have 64 bit OS windows.Hope it will work :)

JDK 7u10 and BlackBerry WebWorks SDK installation issues

For the past few days I have been trying to install the JDK 7u10 which is made available by Oracle. after installing this JDK, I then proceed to install BlackBerry WebWorks SDK but i keep getting he following error message: "JDK 1.6 or higher not installed" what could possibly be the reason for this?
Create enviroment variables JAVA_HOME & JAVA_PATH and point them to 32 bit version JDK bin folder.
on a cmd prompt type: set JA
check if the variables have the right values.
javac -version and java -version should give you the good version, 32 bit!.
check if the enviroment variable PATH has not the location of 64bit path, if it has, correct it,
On the file BlackBerryWebWorksSDK.exe don't forget to enable compatibility with Windows XP (sp3). if you are running win8 or 7
The problems was that JDK needs to be installed as 32-bit, even in a 64-bit architecture.Try this
Is JAVA_HOME properly set? Are you able to run "javac" from the command line? What version of java does "javac -version" report?

Can't start Eclipse - Java was started but returned exit code=13

I am trying to get my first taste of Android development using Eclipse. I ran into this problem when trying to run Eclipse, having installed version 4.2 only minutes ago.
After first trying to start Eclipse without any parameters to specify the Java VM, I got an error message saying it couldn't find a Java VM called javaw.exe inside the Eclipse folder, so I found where Java was installed and specified that location as the parameter in the shortcut's target. Now I get a different error, Java was started but returned exit code=13.
Similar questions seem to indicate that it's a 32-bit/64-bit conflict, but I'm 99% positive that I downloaded 64-bit versions of both Eclipse and Java (RE 7u5), which I chose because I have 64-bit Windows 7.
If anyone knows how to confirm that my Eclipse and Java are 64-bit,
that'd be appreciated.
If you think my problem is a different one, please help!
Please speak as plainly as you can, as I am totally new to Eclipse
and Java.
Shortcut Target: "C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\eclipse.exe" -vm "C:\Program Files (x86)\Java\jre7\bin\javaw.exe"
Full error code...:
Java was started but returned exit code=13
C:\Program Files (x86)\Java\jre7\bin\javaw.exe
-Xms40m
-Xmx512m
-XX:MaxPermSize=256m
-jar C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\\plugins/org.eclipse.equinox.launcher_1.30v20120522-1813.jar
-os win32
-ws win32
-arch x86_64
-showsplash C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\\plugins\org.eclipse.platform_4.2.0.v201206081400\splash.bmp
-launcher C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\eclipse.exe
-name Eclipse
--launcher.library C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\\plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v201205221813\eclipse_1503.dll
-startup C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\\plugins/org.eclipse.equinox.launcher_1.30v20120522-1813.jar
--launcher.overrideVmargs
-exitdata 1e30_5c
-vm C:\Program Files (x86)\Java\jre7\bin\javaw.exe
-vmargs
-Xms40m
-Xmx512m
-XX:MaxPermSize=256m
-jar C:\Program Files\Eclipse-SDK-4.2-win32-x86_64\eclipse\\plugins/org.eclipse.equinox.launcher_1.30v20120522-1813.jar
Your version of Eclipse is 64-bit, based on the paths and filenames.
However, the version of Java that it's picking up is 32-bit, as indicated by where it is coming from, on this line:
-vm C:\Program Files (x86)\Java\jre7\bin\javaw.exe
Program Files (x86) is the folder where 64-bit Windows places 32-bit programs.
Program Files is the folder where 64-bit Windows places 64-bit programs.
This can happen when a system has more than one JVM installed, as is often the case on Windows 64-bit (for example, the JRE download page uses the bit-ness of the browser to determine what bit-ness download to offer you, and many people use(d) 32-bit browsers even though they run 64-bit Windows).
The best way to fix this, assuming you do in fact have 64-bit JRE or JDK on your system, is to specify in eclipse.ini exactly which JVM you want it to use. The instructions are detailed in the Eclipse wiki page, but basically you have to specify the -vm option in the ini file - make sure to read the wiki page carefully as the format is very specific.
Specifying the JVM path in eclipse.ini is strongly recommended because doing so isolates Eclipse from any potential changes to your system PATH that some program installers might make (I'm talking to you, Oracle!).
Another option would be to download and use 32-bit Eclipse instead of 64-bit, but it's still strongly recommended to specify the path to the JVM in eclipse.ini.
Left for historical reference:
To check your version of Java, run
java -version
in a console (command prompt). On Windows 7 with 64-bit Java 6 I get:
java version "1.6.0_27"
Java(TM) SE Runtime Environment (build 1.6.0_27-b07)
Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode)
Note the 3rd line, which shows that this is a 64-bit version.
On a 32-bit version you'll get something like:
Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing)
If you are on a 64-bit machine, then you can install the 64-bit JDK and uninstall the 32-bit one. For instance on Windows 10, just go to Settings and under Apps, you will find Java. Click on it and you will find all the different versions. Now you can select which one to uninstall.
I got this error and found that my PATH variable (on Windows) was probably changed. First in my PATH was this entry:
C:\ProgramData\Oracle\Java\javapath
...and Eclipse ran "C:\ProgramData\Oracle\Java\javapath\javaw" - which gave the error. I suspect that this is something that came along with an installation of Java 8.
I have several Java versions installed (6,7 and 8), so I removed that entry from the PATH and tried to restart Eclipse again, which worked fine.
If it's doesn't work for you, you'll need to upgrade your JDK (to the Java versions - 8 in this case).
Instructions on how to edit PATH variable
There are working combinations of OS, JDK and Eclipse bitness. In my case, I was using a 64-bit JDK with a 32-bit Eclipse on a 64-bit OS. After downgrading the JDK to 32-bit, Eclipse started working.
Use one of the following combinations.
32-bit OS, 32-bit JDK, 32-bit Eclipse (32-bit only)
64-bit OS, 32-bit JDK, 32-bit Eclipse
64-bit OS, 64-bit JDK, 64-bit Eclipse (64-bit only)
If you have recently installed Java 8 and uninstalled Java 7, install JDK 8 and retry.
For me the solution was to go into (on Windows 8.1):
System > Advanced system setting > Environment Variables
Under 'System variables' in the 'Path' variable there was the following first:
C:\ProgramData\Oracle\Java\javapath;
I removed this and Eclipse worked again!
I had the same issue, Java was started but returned exit code=13.
My solution was to create an environment variable to Windows properties variable name = PATH variable value = C:\Program Files\Java\jdk1.7.0_02\bin, not to C:\Program Files (x86)\Java\jre7\bin.
Next I added a line to file eclipse.ini → C:\Program Files\Java\jdk1.7.0_02\bin\javaw.exe.
That worked for me.
The issue was fixed by doing the following steps.
Eclipse finds the JAVA executables from
'C:\ProgramData\Oracle\Java\javapath'
The folder structure will contain shortcuts to the below executables,
i. java.exe
ii. javaw.exe
iii. javaws.exe
For me the executable paths were pointing to my Program Files(x86) (home for 32 bit applications) folder location
I corrected it to Program Files (which homes 64-bit applications) and the issue got resolved
Please find the screenshot for the same.
Adding vm argument to .ini file worked for me
-vm
C:\Program Files\Java\jdk1.7.0_65\bin\javaw.exe
Adding more details to this
for sts 3.9.18 release I was getting error Java was started but returned exit code=13 and for latest release same
issue just the returned exit code was 14. This was due to default java chosed was of 32 bit and this version of sts/eclipes is for 64 bits. resolved this by setting 64 bits version of java in STS.ini file as
-vm
C:\Progra~1\Java\jdk1.8.0_131\bin\javaw.exe
This is before vmargs parameters in the file.
The strangest fix ever. Look at your Eclipse path, and make sure you do not have strange characters (like !, #, and #). It worked for me.
Locate eclipse.ini:
Often at C:\Users\xxx\eclipse\jee-neon\eclipse, add
-vm
C:\Program Files (x86)\Java\jre7\bin\javaw.exe
after
--launcher.appendVmargs
I uninstalled Java update 25, and the issue was solved.
A clean reinstall of the Java JDK did the trick in my case. I am running Eclipse 4.4 (Luna) like a charm now.
You have to go to the folder where eclipse is installed and then you have to change the eclipse.ini file.
You have to add
-vm
C:\Program Files\Java\jdk1.8.0_202\bin\javaw.exe
Your eclipse.ini file will look like the below screenshot
It turned out I only had the 32-bit Java runtime installed.
C:\Program Files (x86)\Java\jre1.8.0_45\
All Eclipse really wanted was for me to install the 64-bit Java runtime. <= SOLVED
Java SE Runtime Environment 8u45 jdk-8u45-windows-x64.exe
http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html
Confirm your installation by checking you now have this folder
C:\Program Files\Java\jre1.8.0_45\
The solution is simple: Put the "eclipse" folder on "C:/Program Files". If it does not work, put it in "C:/Program Files (x86)".
I had this message when I had forgot to install the JDK.
The best answer here is too long. I cannot comment so I added my answer.
Go here:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
Download the latest SDK (of course for x64 if your computer is x64)
Install it
Now the party is finished, and it's time to work with Eclipse ;)
I had the same problem. I was using Windows 8 with a 64-bit OS. I just changed the path to Program Files (x86) and then it started work. I put this line in the eclipse.ini file:
-vm
C:\Program Files (x86)\Java\jre7\bin\javaw.exe
Make sure you don't have special characters (%, $, #, etc.) at Eclipse path.
If you install a 64-bit Eclipse version on a PC with a 32-bit JRE this is guaranteed to occur.
So the solution is quite straightforward: You need to synchronise them by updating either one. This shall happen when downloading Oracle Fusion middleware and Eclipse expects a 32-bit environment while your JRE is 64-bit and your JAVA home is pointing to a 64-bit JDK.
Under system environment variables, make sure "C:\ProgramData\Oracle\Java\javapath" is removed.
Under system environment variables, make sure "C:\Program Files\Java\jdk1.8.0_131\bin" is added.
I had this issue. I installed Java 8 update 25 via Chrome, and therafter attempting to start Eclipse gave the mentioned error.
Uninstalled that update, and Eclipse works again.
I tried some of the solutions, but not worked for me.
Finally, I found another way, ...
Go to Environment Variables → System Variables
Set C:\Program Files\Java\jdk1.7.0_02\bin\javaw.exe to the path in the system variables.
Try it. It worked for me...
I tried the following solution:
I created a shortcut of javaw.exe from path C:\Program Files\Java\jdk1.7.0_71\bin and pasted it into the path C:\ProgramData\Oracle\Java\javapath.
After that, I launched Eclipse, and it worked for me.
I also encountered the same issue. It turned out that the environment variable Path was pointing to an incorrect Java version.
Please check the environment variable and point it to the correct Java. For example:
C:\Program Files (x86)\Java\jdk1.6.0_17\bin
To check the environment variable, go to:
Computer → properties → Advanced system settings → Advanced -> Environment variables
I have just solved the same issue upon setting up my Windows 8.1 PC. Exactly like #George Papatheodorou mentioned above (sorry I cannot add a comment), Eclipse and JRE must be both 64 bit or 32 bit.
However, it seems for Windows 8/8.1 environment, you are going to get 32-bit JRE by default (and I do not know where to change that default for the download), as explained here: http://java.com/en/download/faq/win8_faq.xml
I was using 64-bit Eclipse so there was a discrepancy. I then installed 32-bit Eclipse and everything works fine this time.
So before bothering changing any environment variables, check your JRE and Eclipse version.
Of course you can use 64-bit JRE with 64-bit Eclipse. Just make sure they match because Windows 8.1 will give you 32-bit by default.
I had a similar error after installing Java 8 on my Windows 7 system, 64 bit system.
Changing environment variables, etc. did not help. So I tried to remove the Java Update 8, but that too did not help. Downloading and installing the 64-bit version of Java 8 SDK fixed my problem. I hope this helps.
I had the same issue after I upgraded my JDK from 1.7 to 1.8. I'm using Eclipse 4.4 (Luna). The error is gone after I degrade JDK to 1.7.
Please check whether you have set two JAVA paths in the Environment Variable section. If you already installed two versions of the JDK, it might be, then double check you have put PATH for Java like below.
PATH --> C:\ProgramData\Oracle\Java\javapath
and also
JAVA_HOME ---> C:\Program Files\Java\jdk1.7.0_02\bin
If both are there, then this sort of error may occur.
If it's OK, then check in the ".ini" file the below area is OK or not.
Open ".ini" file and check
-VM path is C:\Program Files\Java\jdk1.7.0_79\bin\
If not, please set it like that and run again.
It could be due to too little memory. You can modify the eclipse.ini file to increase the memory. Something like this might help you: FAQ How do I increase the heap size available to Eclipse?

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