Explain how this program works. You should be able to explain the purpose of every line of code.

$/*1*/$ import java.awt.$*$; $/*2*/$ import java.awt.event.$*$; $/*3*/$ import javax.swing.$*$; $/*4*/$ public class Review$\_$Problem$\_2$ implements ActionListener $\{$

$/*5*//*6*//*7*//*8*//*9*//*10*//*11*//*12*//*13*//*14*//*15*//*16*//*17*//*18*//*19*//*20*//*21*//*22*//*23*//*24*//*25*//*26*//*27*//*28*//*29*//*30*//*31*//*32*//*33*//*34*//*35*/\}$

private boolean checked $=$ false; public Review$\_$Problem$\_2()\{$

final JFrame jf $=$ new JFrame$("$Review Problem $2")$; jf$.$setDefaultCloseOperation$($JFrame$.$EXIT$\_$ON$\_$CLOSE$)$; jf$.$setLayout$($new FlowLayout$())$; final JButton jb$1=$ new JButton$("$Hello$")$;

final JButton jb$2=$ new JButton$("$GoodBy$")$; final JCheckBox cb$1=$ new JCheckBox$("$Confuse Them"$)$; jf$.$add$($jb$1)$; jf$.$add$($jb$2)$; jf$.$add$($cb$1)$; jf$.$setLocationRelativeTo$($null$)$; jf$.$setSize$(400,400)$; jf$.$setVisible$($true$)$; cb$1.$addActionListener$($this$)$; jb$1.$addActionListener$($new ActionHandler$())$; jb$2.$addActionListener$($new ActionListener$()\{$

@Override public void actionPerformed$($ActionEvent e$)\{$ System.out.println$(!$checked $?$ "Goodbye" : "Hello?"$)$;

$\}\})$; $\}$

@Override public void actionPerformed$($ActionEvent e$)\{$ checked $=!$ checked;

$\}$ class ActionHandler implements ActionListener $\{$

@Override public void actionPerformed$($ActionEvent e$)\{$ System.out.println$(!$checked $?$ "Hello" : "Goodbye?"$)$;

$\}\}$

public static void main$($String$[]$ args$)\{$ new Review$\_$Problem$\_2()$;