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How to automatically let cmd close Batch File [duplicate]

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Difference between java.exe and javaw.exe
(4 answers)
Closed 1 year ago.
So i have a Javafx Maven Projekt which i run with a .bat
#echo off
set JLINK_VM_OPTIONS=
set DIR=%~dp0
"%DIR%\java" %JLINK_VM_OPTIONS% -m Main/org.openjfx.Main %*
it works but the cmd stays opend and when i close it the project closes aswell
i asked the question here but i didnt got a working answer so i just ask here
btw sorry for my bad english

You seem to be uncertain what you need to be kept open, (the sole aim of that batch file is to keep a console window open for visual console feedback) but to answer your request, you need to run your bat file from a cmd prompt, in order to pass parameters otherwise it is mainly redundant.
#echo off
set "JLINK_VM_OPTIONS="
set "DIR=%~dp0"
start "" "%DIR%javaw" %JLINK_VM_OPTIONS% -m Main/org.openjfx.Main %*
rem See notes
rem exit
Note
javaW willstart java for windows in non console mode, thus dismissing the batch file. However if you are running from a cmd console that is a separate exit that's needed as an extra last line, so try with rem first then remove that last rem to see any difference.
If you find javaW is not suitable then remove the W at the end.
I have no idea why the source of that file was constructed in such a non windows fashion except the aim seems to be to prefix the run by clearing one and setting one preset environment value, then holding so could be reduced to
#Title "Feedback"&set "JLINK_VM_OPTIONS="&set "DIR=%~dp0"&"%DIR%java" -m Main/org.openjfx.Main %*
#echo Done&pause&exit

What i understand from you is like this question How to automatically close batch program, but keep java program running?
try this if it works.

Javac working with Powershell but not Command Prompt

I am trying to install Java in Windows 10 Home (64 bit). Like many tutorials point out, I downloaded the Java jdk setup file, executed it and once installed changed the Path in the Environment Variables. But for some reason, when I execute the command 'javac' it returns the not internal/external command error in Command Prompt but runs absolutely fine in Powershell. I tried to rectify this by uninstalling Java and reinstalling it very carefully, following all the steps but still this keeps on happening.
Also, during installation of Java, I lost the original value to my Path variable. Could this be causing the problem?
Edit : I was able to get the java command running in the command prompt but javac still won't work. I've already tried the methods suggested on other forums and this one but no luck so far.

See there is no problem with Java installation if you can find JDK(Java development kit) and JRE(Server Java runtime environment) in programme files in windows in a JAVA folder.
The main problem is with the environment variable declaration.
Go to environment variables and make a new path for that.
JAVA_HOME = "YOUR JDK & JRE INSTALLATION PATH"
And another one is
JAVA = "YOUR JDK & JRE INSTALLATION PATH"
Hope that help to you. After doing that if still there problem persisist just restart your PC and check again.

Just add your variable location up to /bin/
Refer to this :
https://www.windows-commandline.com/javac-not-recognized-internal-external-command/

Open file explorer
Right click computer then click properties
click advanced system settings
click environmental variables
click path (for me there was one in user variables for admin and another in system variables)
find the directory for javac (for me it was here C:\Program Files (x86)\Java\jdk1.8.0_191\bin)
so go back to file explorer and open program files x86
then open the java folder
then open the jdk folder
then open the bin folder
highlight the path in the search bar and copy it
click edit on path and paste into the path in the environmental variable for both(if you have more than one path)
If no path exists then create one in user variables
If there is any existing text place a semicolon ; between the text you pasted in there and the preexisting text.
close command prompt and reopen it.
type javac -version
the version info should be listed

This problem comes up with the directory of your command prompt.
check your PowerShell and command prompt default directory.
We can run command prompt as WinKey+R then type cmd, Hit the enter button then check our java version cmd javac -version.

Start Minecraft_Server.jar via PHP Exec() or similar function

I'm trying to build a script that starts minecraft_server.jar (location: user directory / mineserver / minecraft_server.jar ).
I have PHP and Apache installed, and I'm trying trying to start the server JAR from /var/www/html/interface.php.
Via console, the server starts fine by running:
java -Xmx1024M -Xms1024M -jar mineserver/minecraft_server.jar nogui
... from the user directory. So in the interface.php file I have the following (note location listed above):
system('java -Xmx1024M -Xms1024M -jar /home/ec2-user/mineserver/minecraft_server.jar nogui', $retval);
But the server never starts after I visit the file. What am I doing wrong?
Thanks for any and all clues.
I want to say thank you for your help on Thanksgiving. While I haven't found the solution yet, I appreciate the efforts. Thanks again.

Have you checked the error log? It's at /var/log/httpd by default. If anything went wrong, it should be there. Otherwise, it could be starting wrong and I would recommend launching it in a screen so you can hop in and check on anything it's doing.
Install screen through whatever method your distribution uses, and then change the launch string to be:
screen -dmS "minecraft" java -Xmx1024M -Xms1024M -jar /home/ec2-user/mineserver/minecraft_server.jar nogui

The command will be executed with the permissions, and the environment of whatever user account the web server runs under.
In particular, it may have a different PATH entry, and the java command might not even be found, or it might be found somewhere else etc...
Also, be aware of what current working directory it is inheriting from your PHP script.
See exec() and check the output to help yourself do some basic debugging.
Also, you probably want something more like
exec('nohup java etc... > /dev/null 2>&1 &');
so that the process gets properly backgrounded and disconnected from the webserver parent process.

Start a java program without the console

I am trying to use this GUI mod for a Minecraft Server. I wrote a batch file so the server can start with more RAM. When I run just the .jar file, no command window opens and it runs just fine (of course with about 256mb ram) I was reading online that javaw starts a jar file without a command-line-console. But when I use javaw, the command console opens, but when I close it the program remains open. this is my batch file:
#echo off
"%ProgramFiles(x86)%\Java\jre6\bin\javaw.exe" -jar -Xms1024m -Xmx1024m crafty.jar
#echo on
I don't understand java as well as most, so please try to be as clear as possible. Thanks

If you want to start a java program without console popup under windows, this should be helpful:
In command prompt type the following:
start javaw -jar -Xms1024m -Xmx1024m crafty.jar
If you want you can also write this as a batch file.

You should Create Shortcut of "%ProgramFiles(x86)%\Java\jre6\bin\javaw.exe", let's name it as Minecraft, then
edit the Properties of Minecraft shortcut. In the Target textbox, append -jar -Xms1024m -Xmx1024m crafty.jar in the end of javaw.exe
change the Start in as the folder which contains the crafty.jar
Double-click the Minecraft icon to star the server.
That's all.

Create a .bat file with
start javaw -jar yourjar.jar arg0 arg1

start javaw -jar yourjar.jar arg0 arg1
will open the console, but close immediately. it is different from running window .exe.

You will always get the command window opening and closing because you are starting it inside a command window or batch script (which launches an implicit command window to run itself).
In order not to get a command window you must open the file from "not a command window" i.e. an executable launcher.
Take a look at Launch4j which can run a java program from an exe. It can also hide-away the jar file inside the exe if you like.
http://launch4j.sourceforge.net/
There's a little YouTube clip showing them creating an exe from a jar.

A batch file is a way of starting the command prompt with the code pre-written, using javaw is a way of open then closing the prompt. Like I said a batch is a commands prompt you can't stop it from opening.

It's few years, but for windows today as for linux you have the supervisor (pytho based)
supervisor windows based on python

Is there a way to the hide win32 launch console from a Java program (if possible without JNI)

You launch a java program from a console (maybe using a .bat script).
I don't want the console to remain visible, I want to hide it.
Is there a simple way to do this ? Without JNI ?

Use javaw.
http://java.sun.com/javase/6/docs/tooldocs/windows/java.html
The javaw command is identical to java, except that with javaw there is no associated console window. Use javaw when you don't want a command prompt window to appear. The javaw launcher will, however, display a dialog box with error information if a launch fails for some reason.

You can start a java application with start javaw. It will hide the black console window.

This .bat trick works for general programs so I think it should also work for launching java program:
Call start program instead of just program in your .bat script

You can hide the console by using javaw.exe (java without) instead of using java.exe.
One of the most useful associations to set up is to make *.jar files executable with java.exe. Then you can just type the name of the jar on the command line to start it executing.
If you use javaw.exe rather than java.exe you won’t see the console output. Watch out, Java installers often associate *.jar files with javaw.exe instead of java.exe, overriding your setting.

download jsmooth and create your own custom exe in a minute or two. Then just use that exe to launch your java app. You can even get slick and bundle a JRE with your app.
http://jsmooth.sourceforge.net

In case fo running from but file your script should look like
start javaw start javaw -jar ***.jar

Note, that you may need running javaw.exe by providing full path to the file, that may need adding quotes " in case there are spaces in the path. The quotes will trigger recognition of them as "title"-argument for the "start" command.
So, use following correct format:
start "MyTitle" "c:\Program Files (x86)\Java\jdk1.8.0_202\bin\javaw.exe" -jar myApp.jar
where title can be empty if needed