Question

Hi i tried to execute the following command from java code in linux,
ls > out.txt

here is my code

try 
            { 
                Process p=Runtime.getRuntime().exec("ls > out.txt"); 
                p.waitFor(); 
                BufferedReader reader=new BufferedReader(new InputStreamReader(p.getInputStream())); 
                String line=reader.readLine(); 
                while(line!=null) 
                { 
                System.out.println(line); 
                line=reader.readLine(); 
                } 

            } 
            catch(IOException e1) {} 
            catch(InterruptedException e2) {} 

            System.out.println("Done"); 

I checked output file was not generated. However if I leave the output file part only run ls command it successfully executes without error and I can see the output.

Answer 1

What i did is that I opened a new terminal with specific command, in this way I can handle commands whose output will be a continuous stream of events, like adb logcat of android.
I did it according to this tutorial. Linux users will find something similar to this.