How to connect to server running on the system with password protection in java?

Question

I am trying to use Runtime.exec to run a class file from my java code but not able to launch the new process on Linux,The same is working on the windows..

I want or launch the process from GUI (which I am running from a jar file named Launch.jar) on a button click.

So I used the following code.

String curpath=System.getProperty("user.dir");
 Runtime.getRuntime().exec(new String[] { "/bin/bash", "-c", "java -classpath"+curpath+File.separator+" Launch.jar LaunchNewProcess" });

Read and implement **all** the recommendations of [When Runtime.exec() won't](http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html). It will possibly solve the problem, if not it will give a lot more information about ***how*** to fix it. — Andrew Thompson, Nov 07 '12 at 08:24

iabdalkader · Accepted Answer · 2012-11-07T09:25:17.240

1

I think you need to leave a space after -classpath

Runtime.getRuntime().exec(new String[] { "/bin/bash", "-c",
"java -classpath "+curpath+File.separator+" Launch.jar LaunchNewProcess" });

Update: try this:

Runtime.getRuntime().exec(new String[] { "/bin/bash", "-c",
"java -jar "+curpath+File.separator+"Launch.jar" });

edited Nov 07 '12 at 09:25

answered Nov 07 '12 at 08:24

iabdalkader

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String curpath=System.getProperty("user.dir"); String cmd="java -classpath "+curpath+File.separator+"Launch.jar LauchNewProcess"; ProcessBuilder pb = new ProcessBuilder("bash", "-c", cmd); pb.start(); Still the problem is there,I am able to run using the "java -jar Launch.jar" but not directly with the jar file. – milan kumar Nov 07 '12 at 09:15

someone · Answer 2 · 2012-11-07T09:41:44.233

1

put a space after -classpath and also remove space on " Launch.jar"

 try{

     Runtime.getRuntime().exec(new String[] { "/bin/bash", "-c", "java -classpath "+curpath+File.separator+"Launch.jar LaunchNewProcess" });

}catch(Exception e){
   e.printStackTrace();
}

edited Nov 07 '12 at 09:41

answered Nov 07 '12 at 08:24

someone

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Sorry that was a typo,The problem is while runnig from the jar file it is not working,if i am running the jar file as "java -jar Launch.jar" it is working fine. but when i am running the jar file without the command ,it is not working. – milan kumar Nov 07 '12 at 08:44

score 0 · Answer 3 · answered Nov 07 '12 at 08:28

0

IMHO I suggest you to drop using Runtime.exec and start using ProcessBuilder

There are many examples/tutorials out there, here's one

answered Nov 07 '12 at 08:28

Evan P

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How to connect to server running on the system with password protection in java?

3 Answers3