public static Cachier getInstance() { if (uniqueinstance == null) { uniqueinstance = new Cachier(); } return(uniqueinstance); }
private void btnPurchase_Click(object sender, EventArgs e) { String order_id = addOrderToTable(); Cachier c = Cachier.getInstance(); c.setTotalFromPos(amountToPay, order_id); c.updateInitialValues(); this.Hide(); c.Show(); reset(); }