How to communicate with another Process in java?

Question

I want to run another Process from my Java Code and to communicate with it; I mean that the main program will call another program and will give her parameters.

Another words: the second program is running and asking for parameters and the main program should read the output of the second program and according to the output the main program should give her the values. I don't know how to write this code. Thank you so much.

the main program:

ProcessBuilder builder = new ProcessBuilder("password.jar", "Aharon");
builder.redirectErrorStream(true);
Process p = builder.start();
InputStream i = p.getInputStream();
OutputStream o = p.getOutputStream();
BufferedReader br = new BufferedReader(new
    InputStreamReader(i));
BufferedWriter bw = new BufferedWriter(new
    OutputStreamWriter(o));
bw.write("aharon");
bw.flush();
System.out.println(br.readLine());
String sudo = "am326294642";
bw.write("aharon");
bw.flush();
int x;
System.out.println(br.readLine());
while ((x = i.read()) != -1)
  System.out.print((char) x);
o.write(sudo.getBytes());
while ((x = i.read()) != -1)
  System.out.print((char) x);

the second program that should be running:

Scanner in = new Scanner(System.in);
System.out.println("insert your password");
while (!in.next().equals("aharon"))
  System.out.println("wrong!!");
System.out.println("you passed !!! !!! !");

I mean I should read the "password" output and to give according to the output to give him the real password — viper-zero, Apr 24 '19 at 12:07
You could use sockets for this, and then just pass requests to that socket? That should work out just fine too. — vegaasen, Apr 24 '19 at 12:45
This looks similar to https://stackoverflow.com/questions/10942427/how-to-have-2-jvms-talk-to-one-another — sparker, Apr 24 '19 at 13:10

How to communicate with another Process in java?

0 Answers0