public void executeCommands() throws IOException {

//Création de fichiers temporaires
    File tempScript = createTempScript();

    try {
        //Exécution du script
        ProcessBuilder pb = new ProcessBuilder("bash", tempScript.toString());

       //Sortie d'erreur
       try (BufferedReader buffer = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {
               System.out.println(buffer.lines().collect(Collectors.joining("\n")));
       }

      //Sortie standard
      try (BufferedReader buffer = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
               System.out.println(buffer.lines().collect(Collectors.joining("\n")));
       }
        Process process = pb.start();
        process.waitFor();
    } finally {
        //Suppression de fichiers temporaires
        tempScript.delete();
    }
}

public File createTempScript() throws IOException {
    //Création de fichiers temporaires
    File tempScript = File.createTempFile("script", null);

    Writer streamWriter = new OutputStreamWriter(new FileOutputStream(
            tempScript));
    PrintWriter printWriter = new PrintWriter(streamWriter);

    //J'écrirai un script.
    printWriter.println("#!/bin/bash");
    printWriter.println("cd bin");
    printWriter.println("ls");

　　//Fin d'écriture
    printWriter.close();

    return tempScript;
}

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