Corrupt Unicode Characters

[John Thomass]

I'm trying to internationalize my program, but I'm having some problems. The characters aren't being displayed correctly. This happens with all languages with unicode characters, not just Czech. I've tried typing the unicode characters directly into the .properties file:

WELCOMETEXT=V�tejte do EasyForm!\n\n Je to porv� co spouat�te EasyForm, proto potYebujete nastavit heslo pro aifrov�n� a deaifrov�n�. Toto heslo budete muset vkl�dat poka~d�.

I've also tried using the native2ascii program to produce this:

WELCOMETEXT=V\u00c3\u00adtejte do EasyForm!\n\n Je to porv\u00c3\u00a9 co spou\u00c5\u00a1t\u00c3\u00adte EasyForm, proto pot\u00c5\u2122ebujete nastavit heslo pro \u00c5\u00a1ifrov\u00c3\u00a1n\u00c3\u00ad a de\u00c5\u00a1ifrov\u00c3\u00a1n\u00c3\u00ad. Toto heslo budete muset vkl\u00c3\u00a1dat poka\u00c5\u00bed\u00c3\u00a9.

But whenever I run the program, I just get corrupt characters:

V��tejte do EasyForm!
 
 Je to porv�� co spou��t��te EasyForm, proto pot�"ebujete nastavit heslo pro ��ifrov��n�� a de��ifrov��n��. Toto heslo budete muset vkl��dat poka��d��.

This is the code I'm using to create get and set the language strings:

ResourceBundle lang = ResourceBundle.getBundle("lang", new Locale("en"));
JTextPane txtWelcomeText = new JTextPane();
            txtWelcomeText.setText(lang.getString("WELCOMETEXT"));
    System.out.println(lang.getString("WELCOMETEXT"));
            txtWelcomeText.setBackground(null);
            txtWelcomeText.setEditable(false);
            txtWelcomeText.setBorder(null);
            welcomePage1.add(txtWelcomeText,c);

The dodgy text appears in both the console and on the JTextPane, and all of the menus and buttons in the application.