Saving a key in a class file

Question

Hi
i have an app that creates a key, needs to store it and read in again later on. I know how to save the key to file using the ObjectOutputStream and how to read in the key again from file.
For security reasons i now want to store the Key in a class file (create a class file where the key is placed in as a String or something like that and than compile it [and obfuscate it}) instead of saving it to a file (because in a file everybody is able to read the key). How can i do that? I thought of a kind of "Wrapper Class" but i don't get the starting point how to do it.
Can please somebody show me how this is done?
Thanks a lot for your help.

Answer 1

try {
               FileOutputStream fo = new FileOutputStream(f);
               ObjectOutputStream so = new ObjectOutputStream(fo);
               so.writeObject(key);
               so.flush();
          catch (IOException e) {
               System.out.println("Serialization IOException: " + e.getMessage());
               e.printStackTrace();
          catch (Exception e) {
               System.out.println("Serialization Exception: " + e.getMessage());
               e.printStackTrace();
          }the keys themselves are serializable so you can use code like this o write the key to a file. You can use FileInputStream to read the object back into your program.