ProcessBuilder - Java program - Running Batch programs -

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i have requirement create 1 java utility 1 of process in our team automated. existing process calls executable , business processing in sequence. wrote small program 

    fileinputstream fstream;     try {         string [] cmd = new string[3];          if(system.getproperty("os.name").tolowercase().contains("win")){             cmd[0] = "cmd.exe";             cmd[1] = "/c";         } else{             cmd[0] = "/bin/sh";             cmd[1] = "-c";         }          fstream = new fileinputstream("c:\\javaprogram.txt");          bufferedreader br = new bufferedreader(new inputstreamreader(fstream));         string fileline,fileline1;            //read file line line           while ((fileline = br.readline()) != null)              {             cmd[2]=fileline;               processbuilder proc = new processbuilder(cmd);             process p = null;              proc.redirecterrorstream(true);             system.out.println("starting process "+ fileline);             p = proc.start();                bufferedreader br1 = new bufferedreader(new inputstreamreader(p.getinputstream()));               while ((fileline1 = br1.readline()) != null)                  {                  system.out.println("output"+ fileline1);               }              int exitvalue = p.waitfor();             system.out.println("\nexit value " + exitvalue);           }           br.close();     } catch (filenotfoundexception e) {         // todo auto-generated catch block         e.printstacktrace();     }

the program reads javaprogram file contains list of programs executed in sequence. have following queries:

  1. the process runs in background , monitor, had check in task manager. there way process can run foreground.
  2. there cases in program results in error. correct way capture error i.e. based on waitfor() output. current logic displayed value[which enhance later display proper error message]
  3. is way best way handle requirement[please ignore basic redundancy /extra processing @ point of time in dev phase]
  4. some programs execute require administrator priviledges. code required
  5. any other things taken care of??


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