Java jtextfield - can't change input language, how to fix it?

Question

Java

I call - JOptionPane.showInputDialog () - it works fine on my computer - both Russian input and English, but on a virtual machine or on another computer I can only enter Russian letters (language switching does not work), I don’t understand what the problem is.

Tried:

Locale.setDefault(Locale.ENGLISH);
System.setProperty("user.language", "en");

Answer 1

Strange mistake, of course, because. on one computer appeared on the other no, but decided that. that i called the method frame.setVisible(true);before the dialog started