public void initGui()
{
int posX = (this.width - xSize) / 2;
int posY = (this.height - ySize) / 2;
amountField = new DigitTextField(fontRenderer, posX + 10, posY + 40, 59, 10);
amountField.setFocused(true);
amountField.setEnableBackgroundDrawing(false);
amountField.setTextColor(0xFFFFFF);
buttonList.clear();