ExchangeWindow.java 文件源码

private KeyListener getKeyListener() {
    KeyAdapter listener = new KeyAdapter() {
        @Override
        public void keyTyped(KeyEvent e) {
            char c = e.getKeyChar();
            if(Character.isLetter(c) && !e.isAltDown()) {
                e.consume();
            }
        }
    };
    return listener;
}