executing within java a commandline bash command with no output is not executed like -

using code:

   private string executecommand(string cmd ) {      process p;     try {         p = runtime.getruntime().exec(cmd);         bufferedreader br = new bufferedreader(             new inputstreamreader(p.getinputstream()));          while ((commandlineoutput = br.readline()) != null){                 system.out.println("line:" + commandlineoutput);              }         p.waitfor();                 system.out.println (p.exitvalue());          p.destroy();     } catch (exception e) {}    } return commandlineoutput; } 

i run following problem: commands generate output executed normal, commands not generating output not executed instance : rm *.jpg not working mkdir is, can not see difference

i quite newbie, googled quite time particular problem never mentioned please me out thanks

when run rm * on linux, shell interprets , takes care of *. in java, same shell isn't running, * isn't being interpreted wildcard.

as pointed here, try extracting target/working directory out of cmd input , like:

file[] files = new file(<directory>).listfiles(); for(file file : files){   if(file.getabsolutepath().endswith(".jpg")){       //perform delete   } } 

alternatively, can try (not-tested, since don't have linux box right now):

string[] command = new string[] {"rm", "*.jpg"} p = runtime.getruntime().exec(command);