Running command for Linux from Java runtime

Question

Can anyone help me how to run a gpg encryption command from a java program using Runtime.getRuntime().exec()?

sample command which I wanted to run shown below:

gpg -u 'receipient' -r KeyID --armor --output /home/myuser/tmp/check.pgp --sign --passphrase '&sw@217' --batch --encrypt /home/myuser/tmp/check.txt*

When I try to execute this from my Java program it gives error like "usage: gpg [options] [filename]"

Please help on resolving this error and run the above gpg command from a java program.

What code have you tried? Have you tested the command itself? — phflack, Oct 31 '17 at 15:40
Runtime.exec is obsolete. Use [ProcessBuilder](https://docs.oracle.com/javase/9/docs/api/java/lang/ProcessBuilder.html). Also, no one can troubleshoot your code if you don’t show your code in your question. — VGR, Oct 31 '17 at 16:36

score 0 · Accepted Answer · answered Oct 31 '17 at 17:25

The following code should solve your problem if the gpg binary is correctly installed on your host.

Process p = new ProcessBuilder("gpg -u 'receipient' -r KeyID --armor --output /home/myuser/tmp/check.pgp --sign --passphrase '&sw@217' --batch --encrypt /home/myuser/tmp/check.txt*".split(" "))
.inheritIO()
.start();

p.waitFor();

I haven't the correct settings but this code runs as expected. You can try it here: https://tech.io/snippet/VzJtME0

Running command for Linux from Java runtime

1 Answers1