Execute external program in java [closed]

问题:

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 txt file. The java program runs but it does nothing

Here is my sample code

    String[] params = new String [3];
    params[0] = \"C:\\\\Users\\\\user\\\\Desktop\\\\program.exe\";
    params[1] = \"C:\\\\Users\\\\user\\\\Desktop\\\\images.jpg\";
    params[2] = \"C:\\\\Users\\\\user\\\\Desktop\\\\images2.txt\";
    Runtime.getRuntime().exec(params);

回答1:

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

回答2:

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