Execute external program

Question

I tried to make an application that calls an external program that I have to pass two parameters  It doesn t give any errors  The program exe  written in C    takes a picture and modifies the content of a  txt file  The Java program runs but it does nothing- Here is my sample code      String   params   new String  3       params 0     quot C   Users  user  Desktop  program exe quot       params 1     quot C   Users  user  Desktop  images jpg quot       params 2     quot C   Users  user  Desktop  images2 txt quot       Runtime getRuntime   exec params

User · Answer

This is not right   Here s how you should use Runtime exec     You might also try its more modern cousin  ProcessBuilder   Java Runtime getRuntime   exec   alternatives

User · Answer

import java io     public class Code     public static void main String   args  throws Exception       ProcessBuilder builder   new ProcessBuilder  ls    -ltr        Process process   builder start         StringBuilder out   new StringBuilder        try  BufferedReader reader   new BufferedReader new InputStreamReader process getInputStream                String line   null        while   line   reader readLine       null            out append line           out append   n                  System out println out                 Try online

User · Answer

borrowed this shamely from here  Process process   new ProcessBuilder  C   PathToExe  MyExe exe   param1   param2   start    InputStream is   process getInputStream    InputStreamReader isr   new InputStreamReader is   BufferedReader br   new BufferedReader isr   String line   System out printf  Output of running  s is    Arrays toString args     while   line   br readLine       null      System out println line       More information here  Other issues on how to pass commands here and here

[java] Execute external program

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