Need help with these steps.

If the Clear button is pressed, the bill area is cleared and the total zeroed out.

Once the bill has been totaled, no other food items may be added, nor can the bill be totaled again. Once the bill has been cleared,the food item and total buttons will work again.

public FoodBill createComponents(); setSize(FRAME_WIDTH, FRAME_HEIGHT); class CheeseburgerCostListener implements ActionListener { public void actionPerformed (ActionEvent event) { CheeseBurgerCost = 6.99; resultAreal.append(String.format("Cheeseburger: $%2.2f ", CheeseBurgerCost)); arlist.add(CheeseBurgerCost); } class ChickenParmCostListener implements ActionListener { public void actionPerformed (ActionEvent event) { ChickenParmCost = 10.99; resultAreal.append(String.format("Chicken Parm: $42.2f ", ChickenParmCost)); arlist.add(ChickenParmCost); class PizzacostListener implements ActionListener { public void actionPerformed (ActionEvent event) { PizzaCost = 3.50; resultAreal.append(String.format("Pizza: $%2.2f ", Pizzacost)); arlist.add(PizzaCost); } 610 62 63 64 65 660 670 68 69 70 71 72 73 740 75@ 76 77 78 79 80 81 820 830 84 85 86 87 88 89 90e 916 92 93 94 95 96 97 980 990 100 101 102 103 104 105 106 1070 108 1990 110 111 112 113 114 115 116 117 118 119 120 121 122 class IceCreamCostListener implements ActionListener { public void actionPerformed (ActionEvent event) { IceCreamCost = 2.50; resultAreal.append(String.format("Ice Cream: $42.2f ", IceCreamCost)); arlist.add(IceCreamCost); } class CheesecakeCostListener implements ActionListener { public void actionPerformed(ActionEvent event) { CheesecakeCost = 2.99; resultAreal.append(String.format("Cheesecake: $%2.2f ", CheesecakeCost)); arlist.add(CheesecakeCost); } class Totallistener implements ActionListener { public void actionPerformed (ActionEvent event) { double sum = 0; for(int i = 0; i