How can I correct this java method, so it only allows a minus as the first sign, and not in the middle?

private static void Restriction(JTextField text, int x) f String ttext.getText if(x== 1) { text.addKeyListener(new KeyAdapterO @Override public void keyTyped(KeyEvent e) char c = e.getKeyChar(); if (!(Character. isDigit(c) II (c--KeyEvent .VK.PER?OD)) Il (c-KeyEvent .VK.MINUS && lt.equal s(""))) { e.consume)