import  java.util.Locale;

 import  javax.swing.JFrame;
 import  javax.swing.JTextField;


 public   class  KeyboardSwitcher  extends  JFrame {
    private   static   final   long  serialVersionUID = 1L;

    public   static   void  main(String[] arg) {
     JFrame frame =  new  KeyboardSwitcher();
     frame.getContentPane().add( new  JTextField("ffsffsd"));
     frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
     frame.pack();
     frame.setVisible(true);
  }
  
   public  KeyboardSwitcher() {
     Locale loc =  new  Locale("ru","RU");
      this .setLocale(loc);
      this .getInputContext().selectInputMethod(loc);
  }
}