the problem is that I upgraded to Windows 10 and now I'm installing my tools to programming and now that I installed the JDK 7 of Java, when I try to use in the cmd the command:
- "javac"
The result of this is: "javac" is not recognized as an internal or external command...
But I was edited the PATH with the correct link of jdk, because when I use "java", it is ok.
Now, I tried in the console with this command: PATH=%PATH%;"C:\Program Files\Java\jdk1.7.0_79\bin"
And when I executed the command "javac" it works, but now, when I open other console, it doesn't work, or when I restart the console, this command is not recognized.
What could be the problem?
java is part of the JRE, not the JDK.
You need to add the JDK bin to the system PATH, in
"Control Panel" | System | Advanced | "Environment Variables"
Her's how I configure System variable on Windows 10 :
I am totally new to java and spent hours trying to get the problems with PATH and CLASSPATH worked out. There was one person who said to restart the command prompt after you modify the environment variables; that was it for me. While you are testing different configurations, make sure to relaunch the command prompt before testing. It seems like there are at least 2 different ways of setting this up. I went with the following:
1) In System Variables, add
JAVA_HOME = c:\program files (x86)\java\jdk1.8.0_121
2) In System Variables, add the following to existing Path...
%JAVA_HOME%\bin
That's it.
No need for quotes around anything. No double forward slashes or anything else. I think it would also work if I removed the java_home variable and just listed the explicit path to bin in the PATH variable, but I'm not touching it again now that it finally works.
After adding C:\Program Files\Java\jdk1.8.0_73\bin to the system variables I turned off my command prompt and opened another one. Then it worked.
Maybe a bit late, but i had same problem.
Click on "Move up" button for Java path and move it at top.
It fixed problem for me
just add C:\Program Files\Java\jdk1.7.0_80\bin as the path in environmental variables. no need to add java.exe and javac.exe to that path. IT WORKS
I added below Path in environment variable
;%JAVA_HOME%/bin instead of %JAVA_HOME%\bin
in my case , it fix the problem
I had the same issue on Windows 10 - the java -version command was working but javac -version was not. There are three things I did:
(1) I downloaded the latest jdk (not the jre) and installed it. Then, I added the jdk/bin path tan o environment variable. In my case, it was C:\Program Files\Java\jdk-10\bin. I did not need to add the ; for Windows 10.
(2) Move this path to the top of all the other paths.
(3) Delete any other Java paths that might exist.
Test the java -version and javac -version commands again. Voila!
For some reason it worked for me to add quotation marks to the path folder on windows 10. not C:\Program Files\Java\jdk 1.8.0_111\bin, but "C:\Program Files\Java\jdk 1.8.0_111\bin".
now i got it finally! make sure that there are no spaces before and after the path and put the semi-colon on both sides without spaces
The PATH is for current user, instead you can add a CLASSPATH and below link would help you more PATH and CLASSPATH
I added below Path in environment variable
C:\Program Files\Java\jdk1.8.0_91\bin
and then compiled the program but got the error then I restarted the system and again compiled the program
This time it worked :)
Add java path to environment variables and move it to the top of all the paths available there. It worked for me.
To be sure about your path, you can use double quotes " to locate the path or if you are in Windows, you can browse to path to select "C:\Program Files\Java\jdk1.8.0_121\bin" folder.
in the search window type 'environment variables' this should give you a link to editing the variables. On the variables editing page there is an upper section and a lower section in the lower section add NEW,type path C:\Program Files\Java\jdk-10\bin this worked great for me and it finds the compiler all the time.
Kind of beating a dead horse now but, I want to clarify one thing that may not be quite so obvious. Yes indeed you need to edit the PATH environment variable as already stated many times. The key for me was to edit the PATH under SYSTEM variables. I had inadvertently edited the PATH under USER variables. Why did this matter? On my machine I have to log in as an Administrator to edit environment variables. So editing the User variables was not helping because I run the command prompt under my login (non-admin) account. Grrr!
Also, I found that closing the command prompt window, and re-opening it after the PATH variable update was required. Changing the order of the values, adding semi-colons, etc. didn't make a difference for me.
Cheers
If you have set all PATH variables correctly after installation, just restart it.
I had the same problem, I had also installed new Windows7 OS then I upgraded it to Win 10. Then i started setup necessary tools like IntelliJ, Java jdk,jre, eclipse so on.
In cmd, java -version worked but javac compiler got unrecognized. I checked and all good, the files in the folders, path are correct and so on.
I restarted and checked it again in cmd ,it worked.
what I did is:
I typed ; accidentally in front in the path variable and then hit OK, after this if I again edit it was nowhere going to the same page as earlier, it opened a new page as defined for user variables and then I was able to remove double quotes in front of the PATH VARIABLE.
Everything worked fine then. :)
Did it just now.
Add
PATH = C:\Program Files\Java\jdk1.8.0_66\bin
in Advanced system setting. Then Choose Environment Variable.
for windows 10 Users Use Java path( JDK Bin location) AS "C:\Program Files\Java\jdk-9.0.1\bin" it will work.
Points to remember, do as the image shows. Move the highlighted bar up using move up button, this will help.
I would like to monitor a local Java application using JVisualVM. When I'm starting it, the popup 'Local java application cannot be monitored' or 'Local Applications Cannot Be Detected' is shown. I have read here that it is a permissions problem. Every time when I grant full access to folder %TMP%hsperfdata_MY_USER_ID to me (logged user) and everyone (windows user), the permissions are reset when I start JVisualVM.
I know that another solution is to delete hsperfdata_MY_USER_ID, but why does the permissions trick not work? Is the permissions folder reset a Windows feature?
System : Windows 7
Tested on cmd started as administrator. I use the same accounts and I do not pass any JVM parameters such as com.sun.management.jmxremote.port=XXXX.
For people stumbling here who have a FAT-type file system:
Make a directory (e.g. e:\temp) on an NTFS disk.
Start both java and jvisualvm with an environment variable TMP=E:\temp.
There are three options to set the environment variable for java:
In your IDE, go to the project options or launch options and find the 'Environment' entry, then enter TMP=E:\temp
Open a cmd prompt, and execute set TMP=E:\temp before launching youur java application from the same prompt.
Put the two lines you'd enter at the cmd prompt in a .bat file. Optinally add pause at the end of the bat file to prevent the console window from disappearing in case of a runtime exception or vm crash.
Similarly, for JVisualVM, use one of the last two options.
I had the 'Local Applications Cannot Be Monitored' problem, got it solved like this:
Exit all java processes
Delete existing folder %TMP%\hsperfdata_username
Start jvisualvm, which created the folder with a different casing: %TMP%\hsperfdata_USERNAME
My problem and solution have nothing to do with permissions, so may not work for the original problem in the question.
Also see https://visualvm.github.io/troubleshooting.html#jpswin
This answer is a bit trivial but might still save time.
Check your java application is not lauched with the "-XX:-UsePerfData" option.
My username: A4000000
I had to delete C:\Users\A4000000\AppData\Local\Temp\hsperfdata_a4000000
AppData is a hidden folder.
Then once starting VisualVM again, it created the following:
C:\Users\A4000000\AppData\Local\Temp\hsperfdata_A4000000
Notice the case difference.
Then start:
C:\visualvm_213\bin> visualvm.exe --jdkhome "C:\Program Files\Java\jdk1.8.0_202" --userdir "C:\Temp\visualvm_userdir"
I followed the instructions on the Datomic site: http://docs.datomic.com/getting-started.html, but I'm getting this error when trying to start up the datomic shell prompt. I'm using a windows machine. Any suggestions? I tried the same thing on my linux box and did not get this error.
Edit: moved to a different windows machine and it's working. If I have time to troubleshoot this problem and I find a solution I'll report back
I noticed that you cannot run the shell.cmd from within the bin directory, you need to call it with bin\shell.cmd from the parent directory... hope that helps.
In case you are using cygwin/bash and call bin/shell :
The java runtime on windows does not understand classpath with a ":"
but this is what you get from bin/classpath.
Either correct this or use DOS-CMD shell and call bin/shell.cmd inside.
Regards
Some tips for running datomic on Windows (7 at least):
Do not download datomic into Program Files. On startup, it creates logging directories and temp files into its own directories, so unless you run the command prompt as Administrator, you're gonna have screens full of Unable to write to file... errors.
You need to run datomic as such (assuming you extracted the download to C:)
c:\datomic-free-0.x.xxxx>bin\shell.cmd
Note the backslash. Tripped me up forever coming from *nix world.
After that, return to your regularly scheduled datomic tutorials.
Hi I need to be able to check if a certain software is installed on the clients computer and where, in order to launch it. I found the following three posts as to how to do so on Windows and Mac but I can't seem to figure it out for Linux as there is no registry. Does any one know how this can be done on Linux?
Similar posts for Windows and Mac:
Can a Java applet open a "select directory" and write to a filesystem via JavaScript interaction?
read/write to Windows Registry using Java
How can I see the software installed in a Mac OS using a java application?
any help would be greatly appreciated :)
Assuming your security context allows it, you could call out to which.
$ which java
/usr/bin/java
which will output nothing if the program is not found.
Use the
which file
command to find out if the software is installed in the path. If that comes up with nothing then you could do a
find ./ -name "file"
Also check their local bin or .bin if its not included in the path.
Well, basically every binary installed on Linux is in the PATH (environment variable), so if you can find it there, it's there.
There may also be software that installs into other paths, but in this case the user would need to point them out. It is a very uncommon case to have an application in a seperate path and not adding that one to PATH.
I'm trying to run a sample app in Tomcat. I've installed tomcat, set up the environment variable by creating a new system variable called JAVA_HOME which is set to C:\Program Files\Java\jdk1.6.0_20. And I've created a new dir for the web app in the tomcat program directory. In the cmd prompt I navigate to the tomcat program directory and type in bin/startup.sh and I get the following error: 'bin' is not recognized as an internal or external command, operable program, or batch file.
I'm using tomcat 6.0 and I'm on a windows machine. What could the problem?
On Windows you must run the startup.bat file instead of the startup.sh file (note the extension is different).
Also, enter the bin directory before executing the bat script.
cd bin
startup.bat
Your on windows try:
bin\startup.bat
If you try typing in bin\startup.bat on a Windows machine and still get the same error, there's a possibility that Windows is not seeing the batch script where it should be. As a-horse-with-no-name already said, try installing Tomcat to a location where there are no spaces in the path. In your case, anywhere other than Program Files.
EDIT: To resolve this space issue, you can do two things: 1) Install JDK/JRE to a common location without spaces (say, C:\Java) and set it to be JAVA_HOME environment variable. 2) Install Tomcat to another location (say, C:\Tomcat) and proceed from there. Since these are all in common location, I believe you can do this as a limited account user without needing admin privileges.
Try to install Tomcat (and possibly the JDK) into a directory without spaces.
The script you ran is intended for *nix systems. Try bin\startup.bat
I'm a little confused by some of the answers. First, the error you are receiving is from Windows. Nothing to do with Tomcat. The Windows OS thinks you have entered a command, and doesn't recognize it. Files with the .bat extension are always recognized by Windows as Batch file commands....... soooo..... Navigate to the bin directory, again, under your tomcat installation. Then....
Don't append the bin in front of the command. You should do a quick look to make sure that the "startup.bat" file is here (dir *.bat). Then just type "startup.bat".
Seems like I just type "catalina.bat start" (for my tomcat catalina installation)