HW4 Hint

Please go to TA section for hints.
Please add few lines to the program, compile and test it before you add more lines.
Part of the code is here , it can be compiled and executed.
Please use it as the basic part of your program. compile and test it every time you add new lines. Of course you can make any change you like to the file.
Here are some other hints:

Preparation

To do the homework you should know :

JRadioButton and how to use it as a group.
how to use JTextField and JTextArea. Especially setText, getText, append, setFont.
how to use e.getSource() to distinguish source of the event.
how to use inner class.
how to use MouseListener.
You may like to implements 2 interfaces. Refer to my handout. The syntax is
```
public class ATM implements Interface1, Interface2 {
 // .. code
}
```
But it is not necessary to implement 2 interfaces.

Useful methods

There is a method Component getComponent() in MouseEvent class.
Use numTextField.requestFocus() to bring the focus to the text field.
use numTextField.selectAll() to highlight the text on the text field.
to exit the program, use System.exit(0).

Members for ATM.java

The following are some suggestions. You don't have to follow my hints.

String action, the action can be "Balance", "Withdraw", "Deposit".
void unhighlight(Component comp) : unhighlight the component. Bascially it reset thes background color.
void highlight(Component comp) : highlight the component. It resets the background color.
void proceed() : reaction of the program after you click the proceed button. The program responses according to the String action
void cancel() : reaction of the program after you click the cancel button. The program responses according to the String action.
I used 2 action listeners in my program. One for number buttons. And the other one for all the other buttons.