CODEWITHSUNDEEP
javaprocessprocessbuilder
ma.aero
ma.aero

Reputation: 107

ProcessBuilder not read execute file

Below c program has two arguments a,b if it is match from user input,it print the values. I try to run c execute file in Java ProcessBuilder, but it does not read execute file.

Java code

import java.io.*;
import java.lang.Runtime;
import java.lang.*;
import java.io.File;
import java.lang.ProcessBuilder;
public class arg
{
 public static void main(String[] args)
 {
  try
  {
   ProcessBuilder pb = new ProcessBuilder("path","-args[1]", "-args[2]");
   pb.redirectErrorStream(true); 
   Process p = pb.start();
   String s;
   BufferedReader stdInput = new BufferedReader(new 
                                           InputStreamReader(p.getInputStream()));
   BufferedReader stdError = new BufferedReader(new 
                                           InputStreamReader(p.getErrorStream()));
   OutputStream stdOutput =   p.getOutputStream();                      
   stdOutput.close();
   while ((s = stdInput.readLine()) != null)
   { System.out.println(s);    }    
     System.out.println("Done.");
     stdInput.close();              
  }//try
  catch (IOException ex) { ex.printStackTrace();    }
    } //void
  } //main

c code

   #include <stdio.h>
   #include <sys/timeb.h>
   #include <string.h>
   main(int argc, char **argv)
   {
   setbuf(stdout, NULL);
   int i=1,j,n;
   char a,b;
   for (i=0; i<argc; i++)   
   { printf("%s\n", argv[i]); }

     if(!strcmp(argv[1],"a"))
     {
       if(!strcmp(argv[2], "b"))
       {    
       for( j = 0; j<= 4; j++ ) 
        { printf("Iteration[%d] %d\n",j, j); }
       }
       return 0 ;
    }
   } //main

Upvotes: 0

Views: 321

Answers (2)

lanoxx
lanoxx

Reputation: 13041

You probably want to write:

if (args.length >= 2)
    ProcessBuilder pb = new ProcessBuilder("path","-" + args[0], "-" + args[1]");

also Java arguments are indexed from 0, not from 1, there is no program name in the first argument like in C.

Upvotes: 0

NilsH
NilsH

Reputation: 13821

It's not clear to me what you're trying to do, but if you want to pass the ProcessBuilder the parameters from the java command line, then you need to do 

ProcessBuilder pb = new ProcessBuilder("path", args[0], args[1]); // Note, index starts with 0

The way you do it, you're sending the actual strings "arg[1]" and "arg[2]" to your command.

Upvotes: 2

Related Questions