How do I execute Bash commands and collect the output from Java?

Question

Hi all, basically I am writing a basic console app, and would like to be able to run commands from it, such as sudo***, halt, ifconfig, etc.

Any insight?.

cheekoo · Accepted Answer · 2011-02-03 18:35:11Z

12

You can use processBuilder API for this purpose. See this example.

answered Feb 3, 2011 at 18:35

cheekoo

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4 Comments

Ron Over a year ago

don't forget to call processBuilder.redirectErrorStream(true). Or spin up another thread to drain stderr.

eis Over a year ago

I don't see any mention of bash in the "example"

Zhiyong Over a year ago

Link to example broken.

Zanidd Over a year ago

Do you have another example link? or a mirror?

CloudyMarble · Accepted Answer · 2011-02-03 20:00:52Z

3

untested code:

Runtime run = Runtime.getRuntime();
Process pr = run.exec(bashcommand);
pr.waitFor();
BufferedReader buf = new BufferedReader(new InputStreamReader(pr.getInputStream()));

while ( ( String line ; line = buf.readLine() ) != null ) 
{
  System.out.println(line);
}

answered Feb 3, 2011 at 20:00

CloudyMarble

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