running windows powershell command in java

Question

I am able to run this command in Windows PowerShell.

Add-Content -Path C:/Users/User/Desktop/sda.txt -Value "`nThis is the last line"

I tried to run the similar command via Java but it's not executing the command.

Runtime runtime = Runtime.getRuntime();
System.out.println("powershell Add-Content -Path C:/Users/User/Desktop/sda.txt -Value " + "\"`nThis is the last line\"");
runtime.exec("powershell Add-Content -Path C:/Users/User/Desktop/sda.txt -Value " + "\"`nThis is the last line\"");

Second attempt as suggested by aquaraga

Runtime runtime = Runtime.getRuntime();
Process proc;
System.out.println("powershell Add-Content -Path C:/Users/User/Desktop/sda.txt -Value " + "\"`nThis is the last line\"");
proc = runtime.exec("powershell Add-Content -Path C:/Users/User/Desktop/sda.txt -Value " + "\"`nThis is the last line\"");
try {
            proc.waitFor();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

You have to assign the return value of runtime.exec to a variable, say proc. Then perform proc.waitFor() — aquaraga
– aquaraga, Commented Jul 19, 2015 at 4:53
It is most likely waiting for a user input or erroring out. Before you waitFor(), can you print the content of the process' error stream? You can refer to this gist: gist.github.com/aquaraga/758c09eb482d1934b4bb — aquaraga
– aquaraga, Commented Jul 19, 2015 at 5:11
Add-Content simply adds a line to the end of a file; why not program that functionality entirely in Java? It would be shorter & cleaner... — tucuxi
– tucuxi, Commented Jul 19, 2015 at 5:20

aquaraga · Accepted Answer · 2015-07-19 05:23:00Z

1

Wrap the powershell command argument in a single quote:

proc = runtime.exec("powershell Add-Content -Path C:/Users/User/Desktop/sda.txt -Value " + "\"'`nThis is the last line'\"");

answered Jul 19, 2015 at 5:23

aquaraga

4,18826 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

running windows powershell command in java

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related