Turn an object reference into useful data?

[Jacob Morehouse]

Hello!


This is probably an easy one, but for some reason my searches turn up nothing. I'm possibly Googling this wrong? Anywho, here's my code:

//obListPasswords is an observable list that contains objects

for (int i=0; i<obListPasswords.size(); i++) {
            bytesToWriteString = bytesToWriteString + obListPasswords.get(i) + "\n";
        }

This results in references to those objects, like "passwordgeneratorfx.Password@41b192cc." I've given the Password class a method of "getPaswordContents" that returns a string value, but I cannot seem to reference it here. How would I call that method here on each object in the list?

Thanks,
Jake

[K. Tsang]

Jacob Morehouse wrote:Hello!


This is probably an easy one, but for some reason my searches turn up nothing. I'm possibly Googling this wrong? Anywho, here's my code:

//obListPasswords is an observable list that contains objects

List<Password> listPasswords = new ArrayList<>();
ObservableList<Password> obListPasswords = FXCollections.observableArrayList(listPasswords);

//...

for (int i=0; i<obListPasswords.size(); i++) {
            bytesToWriteString = bytesToWriteString + obListPasswords.get(i) + "\n";
        }

This results in references to those objects, like "passwordgeneratorfx.Password@41b192cc." I've given the Password class a method of "getPaswordContents" that returns a string value, but I cannot seem to reference it here. How would I call that method here on each object in the list?

Thanks,
Jake

Hello Jake

Have you consider using the for-each loop?

for (String s : obListPasswords) {
  bytesToWriteString = s.getPasswordContents(); // do something with s
}

If you get the "passwordgeneratorfx.Password@41b192cc" then the object is referring to the internal "toString()" method. You can override the toString() method to give you what you want.

[Jacob Morehouse]

Of course after giving up and posting, I solve it:

//First, use generics on the lists...
List<Password> listPasswords = new ArrayList<>();
ObservableList<Password> obListPasswords = FXCollections.observableArrayList(listPasswords);

//Now when I do that, it lets me use the methods of the Password class: 

for (int i=0; i<obListPasswords.size(); i++) {
     bytesToWriteString = bytesToWriteString + obListPasswords.get(i)[b].getPasswordContents() [/b]+ "\n";
}

And away we go! Still getting used to generics. Also, welcoming any better or more concise solutions. There's always someone out there with a better way to skin the proverbial cat.

Thanks,
Jake