Execute bash command within java program

Question

It\'s been quite a while since I\'m looking for but I don\'t find the solution. I\'m trying to execute bash command on Linux within .jar file. For that, I tried many things, in

Answer 1

To understand this, you first need to understand how you would run that command at a shell prompt.

$ sh -c "java -jar M1_MIAGE_PDL_VIZ_GROUPE3.jar menu"

Note where the double quotes are. The first argument is -c. The second argument is the stuff inside the quotes; i.e. java -jar M1_MIAGE_PDL_VIZ_GROUPE3.jar menu

Now we translate that into Java:

Process p = new ProcessBuilder(
   "/bin/sh", 
   "-c", 
   "java -jar M1_MIAGE_PDL_VIZ_GROUPE3.jar menu").start();

Having said that, the above doesn't actually achieve anything. Certainly, it doesn't open a fresh console window to display the console output etcetera. Unlike Windows "CMD.exe", UNIX / Linux shells do not provide console / terminal functionality. For that you need to use a "terminal" application.

For example, if you are using GNOME

Process p = new ProcessBuilder(
   "gnome-terminal", 
   "-e", 
   "java -jar M1_MIAGE_PDL_VIZ_GROUPE3.jar menu").start();

will (probably) do what you are trying to do.

Answer 2

I think the easiest way to do this would be to create a shell script (.sh extension) and then you can easily run that from within the Java program. There is a good answer on a previous question on how to run shell scripts within Java here.

To create a shell script you can use any text editor and create a file with the extension .sh and just enter the lines as you would in the bash terminal.