How to modify a file .properties

Question

Hi,
I wrote this function in order to modify the values in a generic property file :
    private boolean modifyPropertyValueForAkey(String KeyValue, String propValue) {
        // 1.  acquisire il file properties
        Properties prop = new Properties();
        InputStream inStream = null;
        try {
            inStream =  Computer_STATUS_ForNetworking.class.getResourceAsStream (nameOfThePropertyFile);
            prop.load(inStream); // abbiamo caricato prop (usando inFil)
            // a questo e' servito inStream
            inStream.close(); // chiuso il file per leggere
        } catch (IOException ex) {
           System.out.println("modifyPropertyValueForAkey (IOException 111) " + ex);
        // ======================
        //2.   bisogna avvisare che la modifica non si puo' fare
        if (prop.containsKey(keyValue) == false) {
            return false;
        // ======================
        // 3.  scrivere (= salvare la modifica nel file properties)....
        OutputStream outFil = null;
        try { 
            outFil = new FileOutputStream(nameOfThePropertyFile); // salvato il file
        } catch (FileNotFoundException exep) {
            System.out.println("modifyPropertyValueForAkey (FileNotFoundException 222) " + exep);
        try {
            // key = key_database_path_omTheServer
            prop.setProperty(KeyValue, propValue); // assegnare il valoe
            prop.store(outFil, "---No Comment---");   // salvare la modifica
            // errore la modifica non e' effettuata !!!!!!!!!!!!!!!!!!!!
            outFil.close(); // chiuso il file per scrivere
        } catch (IOException exeption) {
            System.out.println("modifyPropertyValueForAkey (IOException) " + exeption);
        return true;
    }//modifyValuesInApplicationNetworkingConfiguration()I did it following a pattern that I found in the tutorial.
It looks to me to be correct, but it doesn't work..
What it is wrong there ?
I need some help to fix this problem.
thank you
regards
tonyMrsangelo

Answer 1

hi,
thank you for answering me
the function doesn't work because, when the code is executed, the
value of the property (for the key that demand to be modified) doesn't change.
I am not sure about the part of the function that fails
(I know only that no exceptions are raised).
I run this function debugging the program, and
I realized that the .. the bug, in the program, come because the value of
the property that is expected to be changed it is not.
I made several tries to learn more about the fault....
but all I can learned is that, when I open the property file (using the
NetBeans IDE) the value of the property doesn't change..
thank you
regards