In Windows, I made a small script to compile and then run a Java application:
javac helloWorld.java
java helloWorld
helloWorld prints "Hello, world!" and then the command prompt closes immediately. What I want to happen is for the program to execute then have a new line on the command prompt ready to go.
EDIT: 1 more stipulation. It needs to be just one batch file, not a batch file calling another one.
Append the line:
cmd
...at the end of your batch file.
you need to start an instance of cmd.exe and just let it run.
You could start the script like this:
cmd /K script.cmd
This will keep the cmd shell open.
You can accomplish this by creating a desktop shortcut with the given line.
Related
I am running a batch (ScanProject.bat) file using java by following code
Process p= Runtime.getRuntime().exec("cmd /c start /wait ScanProject.bat "+ BaseProjDir+"\\"+jo.getString("Name")+" "+st.nextToken());
System.out.println("Exit value : "+p.waitFor());
And following is the batch file code :-
%2:
cd %1
ant -f ..\antbuild.xml analyse
exit
Batch file run successfully but problem is command prompt window do not closes automatically and hence Process do not terminated automatically and my program wait for infinite time to complete this process.Please suggest me any technique so that cmd exit after running ant -f ..\antbuild.xml analyse command.
Thanks.
cd /D "Full path of directory" or pushd "Full path of directory" with popd before exit is better to switch the current directory to any directory on any drive (cd and pushd/popd) or even to a network share (just pushd/popd). Run in a command prompt window cd /? and pushd /? for details.
cmd /C starts a new Windows command process with closing the process automatically after last command was executed. Run in a command prompt window cmd /? for details on options of Windows command interpreter.
start is a command to start a new Windows command process or a GUI/hybrid application in a separate process.
So what you do here is starting a new Windows command process which starts a new Windows command process.
Running in a command prompt window start /? outputs the help for this command. start interprets often the first double quoted string as title string for the new command process. This causes often troubles on command lines with at least 1 double quoted string. Therefore usage of start requires often an explicit definition of a title string in double quotes as first argument for start which can be even an empty string, i.e. simply "" as first argument after start.
As it can be read after running exit /? in a command prompt window, this command without /B always exits the current Windows command process immediately. So when ant.exe finished, the command process in which the batch file was processed is definitely terminated.
I'm having no experience on Java development, but in my point of view it should be enough to use the following execution command which does not need a batch file at all.
The Java code line
Process p= Runtime.getRuntime().exec("cmd.exe /C cd /D \"" + jo.getString("Name") + "\" && ant.exe -f ..\\antbuild.xml analyse");
should be enough to
start a new Windows command process,
set the current directory within this command process to the drive and directory specified by jo.getString("Name") which of course must return a directory path with drive letter and using backslashes as directory separators, and on success
execute ant in this directory with the specified parameters
with terminating the Windows command process automatically after console application ant.exe finished if ant.exe is a console application.
I'm not sure if cmd.exe /C is needed at all.
I suggest to test this command first manually from within a command prompt window. Then use it in the Java application if really working and producing the expected result. And finally I would further test if cmd.exe /C is needed at all in Java code.
See Single line with multiple commands using Windows batch file for details about the operator && to run a command after previous command was successful. And see also Why do not all started applications save the wanted information in the text files as expected? for an explanation of console / GUI / hybrid application.
NOTE: There is also Java Runtime method exec(String[] cmdarray, String[] envp, File dir) to execute a command like ant.exe with its parameters -f and ..\antbuild.xml and analyse in the directory defined with third parameter which might be better for this task.
Swap out exit for taskkill, assuming you do not have any other cmd processes running. Not very graceful but it will get the job done.
%2:
cd %1
ant -f ..\antbuild.xml analyse
taskkill /im cmd.exe
I am trying to make a console-based Java application that starts some batch scripts that do some other irrelevant things. Presently, I just want to find the proof of concept
I have tried to use the following code:
Runtime.getRuntime().exec("cmd /c start pathtomybatch.bat");
This works fine until I turn it into a .jar file and attempt to execute it. Then it opens the batch file in a new command prompt window, which I don't want it to do. I want to open the batch file in the same window that my Java program is running in. I read about the start command on TechNet and SS64 and found out that apparently adding changing start to start /b would open the program in the same command prompt window. However, when I try to run this:
Runtime.getRuntime().exec("cmd /c start /b pathtomybatch.bat");
NetBeans says BUILD SUCCESSFUL for both lines of code, but when I try the second line of code, no command prompt window opens and my batch file doesn't get started.
I want to know how I can make Java open that batch file within the same command prompt window without stopping the Java application or waiting for it to finish.
Also, as a tiny extra request, could someone tell me if I could do the same for an .exe file?
I'm on Windows 7, but I want this app to work for people using Vista or newer.
The extra window is coming from the start command you initiate. See https://www.windows-commandline.com/cmd-start-command/
A better pattern is to use
Process p = Runtime.getRuntime().exec("cmd /c pathtomybatch.bat");
Then make sure you loop until p.exitValue() no longer throws an exception (which means the process has exited), and while looping copy all available bytes from p.getOutputStream() and p.getErrorStream() to System.out and/or System.err.
I'm using apache-commons-exec to execute some commands in a Java application.
When I execute 'ls -la /home/user' it works great.
But I need to execute something like this
./setEnvsOfTypeXXX.sh; ./setEnvsOfTypeYYY.sh; ls -la /home/user
I enter the command into the CommandLine object and it doesn't work.
It returns an empty string and -559038737 exit code.
Because the nature of the environment and the scripts (the firsts ones sets some needed environment variables); i can not put all the call into a script o
I've tried many solutions (like surround all the command with quotation marks like "'" or use the PumStreamHandlet input stream) but nothing has worked so far...
Anyone has an idea ?
try
sh -c '. ./setEnvsOfTypeXXX.sh; . ./setEnvsOfTypeYYY.sh; ls -la /home/user'
As your command
Two things I'm guessing you need here.
First if you are setting enviroment variables you probably need to use .
Second you want to run a shell and get the shell to exec the shell scripts and then run the following command, all in the same context
I tried this code
cmdLine = new CommandLine("/bin/bash");
cmdLine.addArgument("-c");
cmdLine.addArgument(new StringBuilder().append("'").append(command).append("'").toString());
And even with command = "ls";
There is an error
bash: ls: No such file or directory
fun fact: in windows this works ok !
cmdLine = new CommandLine("cmd.exe");
cmdLine.addArgument("/c");
cmdLine.addArgument(new StringBuilder().append("\"").append(command).append("\"").toString());
logger.info("Command win line: cmd.exe /c \""+command + "\"");
I totally out of options now !!!
I got a workarround: create a temporal sh file with the command, putting shebang on firts line and giving permissions, executing this file in one command line, get result and output, for last delete temporal file...
and it works !
I need to open run two jar applications in the same time
I know that to run a jar file you have to type
java -jar app1.jar
but I need to terminate the current process to run
java -jar app2.jar
How can I open app2 without closing app1 ?
Execute this bash command
( java -jar app1.jar ) &
( java -jar app2.jar )
The commands will execute in parallel subshells
You can run one, push it into the background, and then run the other.
Run the first command, press ctrl-z and then type bg.
This runs the command in the background, leaving your command line available for you to call you next command.
http://www.thegeekstuff.com/2010/05/unix-background-job/
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