comment = new String(AppProp.getProperty("db.comment").getBytes("Cp1251"));

comment = new String(AppProp.getProperty("db.comment").getBytes("ISO8859-1"));

comment = new String(AppProp.getProperty("db.comment"));
byte[] bytesInUTF8 = comment.getBytes("UTF-8");
comment = new String(bytesInUTF8, "Cp1251"); 

comment = new String(AppProp.getProperty("db.comment"));

public static String getProperty(String key) throws IOException {
        if (properties == null || properties.size() == 0) {
            String mainClassLocation = FilenameUtils.getFullPath(App.class.getProtectionDomain().getCodeSource().getLocation().getPath());
            String propertiesFileFullPath = mainClassLocation + "app.properties";
      
            InputStream fis = null;

                fis = new FileInputStream(propertiesFileFullPath);

            Properties prop = new Properties();

                prop.load(fis);

            for (String k : prop.stringPropertyNames()) {
                if (properties == null)
                    properties = new HashMap<String, String>();
                String value = prop.getProperty(k);
                properties.put(k, value);
            }
        }
        if (properties.containsKey(key))
            return properties.get(key);
        else
            return null;
    }