Java charAt() String index out of range: 0

Question

I have this code :

private void submitPstart() {

    if (tStock.getText().charAt(0)>=\'A\' && tStock.getText().charAt(0)<=\'Z\'){


    }else          


        

Answer 1

Add

if (tStockPIStart!=null && tStockPIStart.length>0) {
    [...]
}