I am setting Environment Variable, Still OS cant recognise. Check this out you will get it.
https://www.dropbox.com/s/raqr4wbtoxxz0b8/1.JPG
I tried with Admin privileges also still same but when I enter
echo %java_home%
or
echo %jre_home%
It is showing path corretly. Why isnt javac command working.
Any Help will be appreciated.
You don't have javac in your path. Setting the JAVA_HOME and/or JRE_HOME environment variables (which aren't needed any more, for the most part) does nothing to the PATH which the command shell uses to find executables.
Put the relevant JDK bin directory in your PATH environment variable instead - and unless you actually need JRE_HOME and JAVA_HOME for some reason, I'd get rid of them. If you do need them, get rid of the "bin" part - it should just be the root JRE directory, e.g.
c:\Program Files\Java\jdk1.7.0_45
Your path JAVA_HOME should be, for example
C:\Program Files\Java\jdk.1.7.0_45
And your Path variable should be
...;%JAVA_HOME%\bin
javac is in the bin folder which should be on your path.
That has nothing to do with Java environment variables.
When you type javac, or any other command, Windows will search the folders in the %PATH% environment variable to find an EXE file with that name.
You need to add your JDK directory to %PATH%.
You also need to restart cmd to pick up the changes.
Include the JRE/JDK path in System variables->PATH as well
After adding path varaibles,restart the cmd
You must restart cmd for new variables to be picked up. And java bin folder needs to be included in path. When you type javac it goes through all folders defined in path to find it.
Related
As-salāmu ʿalaykum,
I'm having trouble setting JAVA_HOME correctly.
I know that the JAVA_HOME needs to be set to C:\Program Files\Java\jdk1.8.0_92
I know PATH has to be set toC:\Program Files\Java\jdk1.8.0_92\bin
I set both the JAVA_HOME and PATH as a user variable and as a system variable.
When I run Android Studio tells me it's invalid. When I echo out JAVA_HOME, it's set as expected. Any ideas?
You need to set your JAVA_HOME to: C:\Program Files\Java\jdk1.8.0_92\
And set PATH to: C:\Program Files\Java\jdk1.8.0_92\bin so that it can be accessible from cmd
Then you might need to restart the computer
Note:
In some cases JAVA_HOME is specified differently somewhere else such as gradle.properties file. In that case, the global value can be overridden by the project's JAVA_HOME for that specific project.
You didn't mention which windows version you are working on. However, you can try to set the JAVA_HOME variable via the command line as an alternate solution.
Open Command Prompt (make sure you Run as administrator so you're able to add a system environment variable).
Set the value of the environment variable to your JDK (or JRE) installation path as follows:
setx -m JAVA_HOME "C:\Progra~1\Java\jdk1.8.0_XX"
If the path contains spaces, use the shortened path name.
Restart Command Prompt to reload the environment variables then use the following command to check the it's been added correctly.
echo %JAVA_HOME%
You should see the path to your JDK (or JRE) installation.
Besides defining the path you need to enable Java in Windows Defender.
Hint: Disable windows defender and firewall (google it).
Put in the prompt "java -version" and "javac -version" commands again and have fun.
Sorry, english isn’t my first language.
I am on JDK 8u25 on Windows 8, and I am experiencing a problem with my Java installation. I can run javac perfectly fine, but running java produces this error message:
The system cannot find the file C:\ProgramData\Oracle\Java\javapath\java.exe
How do I fix this?
I think the problem has to do with my environment variables.
The important variables, as I have set them, are:
JAVA_HOME – C:\Program Files\Java\jdk1.8.0_25
CLASSPATH – .;%JAVA_HOME%\lib
PATH – <other paths omitted>;%JAVA_HOME%\bin
And their expansions, as viewed with set in cmd, are:
JAVA_HOME – C:\Program Files\Java\jdk1.8.0_25
CLASSPATH – .;C:\Program Files\Java\jdk1.8.0_25\lib;%CLASSPATH%;
PATH – C:\ProgramData\Oracle\Java\javapath;C:\Program Files\Java\jdk1.6.0_45\bin;<other paths omitted>;C:\Program Files\Java\jdk1.8.0_25\bin
The full output of set can be viewed here.
I've got a similar problem I'm currently working on solving. I can't say this will solve your error since there may be issues with other software (which is my case with Eclipse Luna).
Java is using the path given in your PATH variable, which is,
C:\ProgramData\Oracle\Java\javapath
Go to this folder (ProgramData is hidden, so unhide it if necessary) and right click on the java.exe symlink. You'll see in the Target field where it's looking for java.exe. It may be pointing to the java.exe file from your previous jdk1.6.0_45 install. Either paste in new shortcuts here or change the PATH setting as others have mentioned.
I've found that the Java installer doesn't change the javapath or update the system path, at least when going from 1.8 to 1.7. In my case changing the shortcuts only led to a problem with Eclipse on startup.
EDIT:-----
After playing with javapath folder shortcuts it turns out you need symlinks, at least for Eclipse. See, Windows how to create directory symlink.
You don't need the /d switch for a file symlink,
mklink java.exe "C:\Program Files\Java\jdk1.8.0_20\bin\java.exe"
mklink javaw.exe "C:\Program Files\Java\jdk1.8.0_20\bin\javaw.exe"
mklink javaws.exe "C:\Program Files\Java\jdk1.8.0_20\bin\javaws.exe"
This now works for me.
Why Oracle did such a poor way to point to java is beyond me. We solved this problem by creating a new link to the JDK
mklink /d C:\ProgramData\Oracle\Java\javapath "C:\Program Files\Java\jdk1.8.0_40\bin\"
The same would work for a JRE if that is all that is required.
This replaces the old symlinks in C:\ProgramData\Oracle\Java\javapath (if they existed previously)
I had in PATH:
C:\ProgramData\Oracle\Java\javapath;C:\Program Files\Java\jdk1.8.0_92\bin;<others omitted>
I removed:
C:\ProgramData\Oracle\Java\javapath;
and that fixed the issue for me. java -version now gives details about the Java version, etc.
This will solve all problems relating to Java and environment variables:
Make your way to Windows' Environment Variables dialog.
Under System variables, select the variable named Path. Click Edit...
Remove the entry that looks like:
C:\ProgramData\Oracle\Java\javapath
Add the path of your JDK/JRE's bin folder.
Don't forget to set JAVA_HOME.
I got same error while running JAVA command. To resolve this, I moved the java path as the first entry in the path, and it resolved the issue. Please have look at this screenshot for reference:
Updating the PATH Environment Variable
If you do not set the PATH variable, you need to specify the full path to the executable file every time you run it, such as:
C:\> "C:\Program Files\Java\jdk1.8.0\bin\javac" MyClass.java
It is useful to set the PATH variable permanently so it will persist after rebooting.
To set the PATH variable permanently, add the full path of the jdk1.8.0\bin directory to the PATH variable. Typically, this full path looks something like
C:\Program Files\Java\jdk1.8.0\bin. Set the PATH variable as follows on Microsoft Windows:
Click Start, then Control Panel, then System.
Click Advanced, then Environment Variables.
Add the location of the bin folder of the JDK installation to the PATH variable in System Variables.
The following is a typical value for the PATH variable:
C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Java\jdk1.8.0\bin
Note:
The PATH environment variable is a series of directories separated by semicolons (;) and is not case-sensitive. Microsoft Windows looks for programs in the PATH directories in order, from left to right.
You should only have one bin directory for a JDK in the path at a time. Those following the first instance are ignored.
If you are not sure where to add the JDK path, append it.
The new path takes effect in each new command window you open after setting the PATH variable.
There are 2 versions of jdk in your PATH VARIABLE jdk1.6.0_45 and jdk1.8.0_25. Try removing the first one ie. jdk1.6.0_45 from the PATH
If you're on a corporate PC that's fairly restricted by group policy, this might work....
Assuming that
your Windows PATH includes C:\ProgramData\Oracle\Java\javapath
you have JDK installed to C:\Program Files\Java\jdk1.8.0_60\bin
Then create the following text file mklink.bat and put it on your desktop:
rem mklink.bat
mklink /d C:\ProgramData\Oracle\Java\javapath "C:\Program Files\Java\jdk1.8.0_60\bin"
pause
Now right-click it and choose "Run as Administrator". Provide admin credentials. The script should report success. Now you can compile or run Java.
This usually happens when you update the java,
the easiest way to solve this is to just uninstall the JDK & then reinstall it.
NOTE: This doesnt remove the path or classpath so no need to worry.
Uninstall all JDKs installed on your computer from the Java Control Panel
Search for C:\ProgramData\Oracle\Java and delete that directory and all files contained within. You can do this from the command line using rmdir /S C:\ProgramData\Oracle\Java
Then search for C:\ProgramData\Oracle and delete the oracle folder. You can do this using rmdir /S C:\ProgramData\Oracle
Now install JDK and set the path.
Run the program.You won't find the same problem anymore.
This problem exists when you upgrade from one version to another.because jdk is not automatically upgraded.
For the same you can change the environmental varibles.
In system variables look for the PATH and add the jdk bin location in the front of the string(not at the back).
Once you have done that check in CMD if "java" and "javac" works.
if it works, again go to system variables.
add "CLASSPATH" A the variable and set value " .
c:\Program Files\Java\jdk1.8.0_91\lib;"
There must be two or more PATH variables. Try merging all of them into one using semi-colon (;)
I got the same after installing java8 from a non-permissioned account.
To fix I simply reinstalled from admin user account.
This created the quoted directory with file links to java exes.
I had also similar problem where by I had to un-install JDK 1.8 and needed jdk 1.7.
What i did was removed the symbolic links from the javapath and then imported the shortcuts of java, javaw, javaws from the bin directory to the javapath folder. However, I found some permission issues in the enterprise laptop where by I did not have the privilege to modify/ update this directory. I had given appropriate permission from the administrator and there by resolved it.
c:\ProgramData\Java\javapath is used for symlinks. You can of course add the full path to your Java Path to %PATH%, but equally you can create a symlink to the path to the above location.
Open CMD as Administrator.
Type mklink java.exe (full path to your Java.exe)
eg
mklink java.exe "C:\Program Files\Java\jdk1.8.0_25\bin\java.exe"
Don't worry.
Just uninstall jdk as well as jdk updates
Before re installing jdk ,delete the oracle folder inside programData hidden folder in C:\
Then reinstall.
Set the following,
JAVA_HOME
CLASSPATH
PATH
JRE_HOME ( is optional)
Please remove "C:\ProgramData\Oracle\Java\javapath\java.exe" from the Path variable and add your jdk bin path. It will work.
In my case the I have removed the the above path and added my JDK path which is "C:\Program Files\Java\jdk1.8.0_221\bin"
For New version of Java JavaPath folder is located
64 bit OS
"C:\Program Files \Common Files\Oracle\Java\javapath\"
X86
"C:\Program Files(x86) \Common Files\Oracle\Java\javapath\"
This will solve all problems relating to Java and environment variables:
Make your way to Windows' Environment Variables dialog.
Under System variables, select the variable named Path. Click Edit...
Remove the entry that looks like:
C:\ProgramData\Oracle\Java\javapath
Add the path of your JDK/JRE's bin folder.
Don't forget to set JAVA_HOME.
This helped me.......:-)
For me it worked like this:
On your desktop go to Search->View advanced system settings->Environment Variables
Under System Variables look for path and click Edit.
Click on New and add the new Path and move it to the top.
To find your java path if you don't know where it is installed in cmd type where javac
<>\Common Files\Oracle\Java\javapath\ is now created as a junction, no symlinks anymore
When i type javac in cmd it's not recognized , although i do have jdk 1.7installed and specified JAVA_HOME as following
c://Programfiles/Java/jdk-1.6/bin // with and without bin , with and without double slash
no result
I also tried
;c://Programfiles/Java/jdk-1.6/bin // with and without bin , with and without double slash
no result
Are there any other possible solutions
PS The System varialbes box is disabled . so i can only add user variables
By default, in order to be found by the shell, all programs have to be inside the system "path" environment variable, which is in no way related to the JAVA_HOME.
If you want configure both of them in the same time you can use the following:
set JAVA_HOME=jdk_path
set PATH=%JAVA_HOME%/bin;%PATH%
Several problems with your approach:
The environment variable JAVA_HOME has nothing to do with the mechanism that your operating system uses for finding executable files. For this the PATH variable is considered. The JAVA_HOME variable is sometimes used by other applications looking for Java.
If using the variable JAVA_HOME, it should be set to the parent directory of the bin directory.
Windows uses back slashes for separating directories, not forward slashes. (EDIT: At least, Windows 7 allows forward slashes, but I would suggest to still use back slashes.) Additionally, there is only one separator between "C:" and the the root directory.
The directory that usually contains installed programs is "Program Files", not "ProgramFiles"
Putting it all together you should do the following:
Create the environment variable JAVA_HOME with your Java installation directory as value, e.g. "C:\Program Files\Java\jdk-1.6". This directory must contain the bin directory, which in turn contains the executable files (such as java.exe).
Extend the environment variable PATH by adding ";%JAVA_HOME%\bin" at the end of it.
Both edits should be made in system variables. Now you simply can open a command prompt and check this setup with a "java -version". This should work.
EDIT
If only user variables can be edited in the environment settings, the following will work:
Add a variable JAVA_HOME to the user variables, as mentioned above.
Add a (new) variable PATH to the user variables with the content "%PATH%;%JAVA_HOME%\bin".
If you now open a command prompt and check the path variable by simply typing "path", you will see that the variables in the path are properly expanded. Now check with "java -version".
Two step process:
set JAVA_HOME=jdk_path;jdk_path\bin and
set PATH=%JAVA_HOME%
Then, to confirm, run:
java -version
What commands are or are not recognized at the command prompt has nothing to do with the JAVA_HOME environment variable, but with the PATH variable.
You can check your path in windows command line with
C:\> path
Apart from that, be sure to point to the correct jdk1.7 bin directory. It is a bad idea to call this ...Java/jdk-1.6/bin
I have downloaded both Java jdk1.7.0_06 and Java jre7. and i added the following system variable JAVA_HOME C:\Program Files\Java\jdk1.7.0_06\bin to my windows 7. But when I type the following in the CMD command line on my windows 7 C:\activiti-5.10\activiti-5.10\setup>ant demo.start to run a demo application I got the following error in the command line '
"java.exe"' is not recognized as an internal or external command, operable program or batch file
So does anyone know how i can solve this problem ?
BR
If you look at the "ant.bat" file, you will see that it looks for the "java" command in the following way:
If the %JAVACMD% environment variable is set, then it uses that.
Otherwise, if the %JAVA_HOME% environment variable is set, it tries to use %JAVA_HOME%\bin\java.exe
Otherwise, it tries to use java.exe; i.e. it will look on your %PATH%.
In your case, you have %JAVA_HOME% set ... but set to the Java installation's "bin" directory, not to the root of the installation. So the Ant.bat script looks in the wrong place for java.exe.
Just set %JAVA_HOME% correctly, and it should work.
JAVA_HOME C:\Program Files\Java\jdk1.7.0_06
As you can see from the above, you do not need to have the Java "bin" directory on your %PATH% for Ant to work, but it is a good idea to set it anyway. That way you can run the Java commands simply from the command line.
The setting of %CLASSPATH% is not relevant to this problem. Indeed, unless the build.xml file is broken, Ant will ignore your %CLASSPATH% environment variable.
You need to put the file java.exe in your PATH variable but the JRE in JAVA_HOME
JAVA_HOME is the path of JDK root folder.eg: C:\Program Files\Java\jdk1.7.0_06 but path define C:\Program Files\Java\jdk1.7.0_06\bin
JAVA_HOME C:\Program Files\Java\jdk1.7.0_06
JRE_HOME C:\Program Files\Java\jre1.7.0_06
path = C:\Program Files\Java\jdk1.7.0_06\bin;C:\Program Files\Java\jre1.7.0_06\bin
Typically JAVA_HOME should be the parent directory of the "bin" folder.(jre or jdk)
In this case ant expects the java to be from the JDK.
try following in a cmd window
set JAVA_HOME=C:\Program Files\Java\jdk1.7.0_06
set path="%JAVA_HOME%/bin;%path%;
ant
(side note: adding java.exe to path is not a requirement for ant; it is a convenience thing for the user)
Just delete the following set of files from your %windir/System32 folder. Actually deleting java.exe is enough but for consistency sake just delete all the java related binaries.
java.exe
javaw.exe
javaws.exe
Actually oracle windows installer places a copy of these files into %windir/System32 folder (which I don't understand why) but looks like they are not needed (as they are available anyway under JDK folder where you install them).
I have tried all the various solutions posted in the SO and other forums as well but none of them worked for me. I have also set all the relevant environment variables (JAVA_PATH, CLASS_PATH etc) correctly as well. Finally this is the only solution that has worked for me.
Go to the \squirrel-sql-3.9.0>squirrel-sql.bat .open that squirrel-sql.bat in Notepad and comment out the existing logic which is
=======================================
if exist "%IZPACK_JAVA%\bin\javaw.exe" (
set LOCAL_JAVA=%IZPACK_JAVA%\bin\javaw.exe
) else (
set LOCAL_JAVA=javaw.exe
)
echo Using java: %LOCAL_JAVA%
=================================
and add the below logic
#echo off
set LOCAL_JAVA=C:\Program Files (x86)\Java\jre7\bin\javaw.exe
echo Using java: %LOCAL_JAVA%
================================
make sure you add the correct path of javax.exe while adding above logic set LOCAL_JAVA=
and start the .bat file from CMD ..that's it. It should work. It worked for me.
I started getting this error in Android Studio after I updated it to version "Electric Eel".
It happened because Android Studio has changed where they put their JRE:
it used to be C:\Program Files\Android\Android Studio\jre
but now it is C:\Program Files\Android\Android Studio\jbr
To fix:
updated my JAVA_HOME environment variable to point to the new java location (C:\Program Files\Android\Android Studio\jre)
and then restarted Android Studio, and now it is fixed.
I agree with the above explanation but if the problem still persists try setting:
CLASSPATH = C:\Program Files\Java\jdk1.7.0_06\bin
I am trying to upload my GAE app using the console in windows. I am getting the error:
cannot find javac executable based on java.home tried, "C:\Program Files\Java\jre6\bin\javac.exe" and "C:\Program Files\Java\bi
n\javac.exe"
Unable to upload app: cannot find javac executable based on java.home, tried "C:
\Program Files\Java\jre6\bin\javac.exe" and "C:\Program Files\Java\bin\javac.exe
javac.exe is located in C:\Program Files\Java\jdk1.6.0_18\bin how do I tell java thats where it is
You must set the JAVA_HOME environment variable to refer to the top-level folder where java is installed. Right-click "My Computer", Properties, Advanced, Environment Variables. If there's an existing JAVA_HOME variable, then correct it so that its value is
C:\Program Files\Java\jdk1.6.0_18
If there is no existing variable, then create one by using the "New" button. It's up to you whether to do it for the current user or for the system.
Do you have two java versions installed?
From the information the sun jre and the Open jdk? The jre has no javac.exe and therefore cant find it.
Try to start your jar with C:\Program Files\Java\jdk1.6.0_18\bin\java.exe instead of only java, if that doesn't help add the -Djava.home="C:\Program Files\Java\jdk1.6.0_18" option to the call.
The error message makes it clear that the lookup is based on java.home, have you tried adjusting that?
This output looks like it is coming from some sort of script which may have it's own definition of java.home which you need to change.
The easiest solution for this problem which I found is to use the JAVA_HOME variable in the script file.
This is the content of my bin\appcfg.cmd:
#"%JAVA_HOME%"\bin\java -cp "%~dp0\..\lib\appengine-tools-api.jar" com.google.appengine.tools.admin.AppCfg %*
Note: you should also check if JAVA_HOME points to an existing JDK
The other way you can do set classpath variable using set CLASSPATH=C:\Program Files\Java\jre6\bin\javac.exe\jdk1.6.0_18 in command prompt, but it works for single session.Everytime you need to set the variable.
Set your JAVA_HOME environment variable to C:\Program Files\Java\jdk1.6.0_18. Note that this variable points to the JDK location, not (unlike the PATH environment variable) to the path where the executables reside.