You have been provided with code that will generate the following user Interface. The code contains missing statements. Write the code for each missing statement. import javax.swing.$*$;

import javax.swing.border. TitledBorder;

import java.awt.$*$;

import java.awt. event.ActionEvent;

$1\mathrm{.}1$

public class VoucherApp $\{$

public static void main$($String$[]$ args$)\{$

SwingUtilities.invokeLater$(()->>\{$

$//$ Create the main frame

JFrame frame $=$ new JFrame$("1\mathrm{.}2$

$(1)")$;

frame.setDefaultCloseOperation$($JFrame$.$EXIT$\_$ON$\_$CLOSE$)$;

frame.setLayout$($new BorderLayout$())$;

frame.setSize$(600,400)$;

$//$ Panel with GridLayout

JPanel gridPanel $=$ new JPanel$($new GridLayout$(2,3,10,10))$;

for $($int i $=1$; i : ;$1)$; i$++)\{$

gridPanel.add$($new JLabel$("$Voucher $"+$ i $+"$: CODE" $+$ i$))$;

$\}$

$//$ Panel with TitledBorder and TextField

JPanel voucherPanel $=$ new JPanel$()$;

voucherPanel$\mathrm{.}1\mathrm{.}4(1)($new TitledBorder$("$Voucher Code"$)$

;

JTextField voucherField $=$ new JTextField$(15)$;

voucherPanel.add$($voucherField$)$; JTextField voucherField $=$ new JTextField$(15)$;

voucherPanel.add$($voucherField$)$;

$//$ Panel with JTextArea, JCheckBox, and JComboBox

JPanel historyPanel $=$ new JPanel$($new BorderLayout$())$;

JTextArea historyArea $=$ new JTextArea$(10,40)$;

historyArea.setEditable$($false$)$;

JScrollPane scrollPane $=$ new JScrollPane$($historyArea$)$;

JCheckBox pensionerCheckBox $1.!$

$\_(1)$

pensionerCheckBox$\mathrm{.}1.$

$(1)$

JComboBox $[]\{$

"Between $65$ and $80",$

"Between $80$ and $90",$

"Over $100"$

$\})$;

ageComboBox.setEnabled$($true$)$;

$//$ Add components to the historyPanel

JPanel checkBoxPanel $=$ new JPanel$()$;

checkBoxPanel.add$($pensionerCheckBox$)$;

checkBoxPanel.add$($ageComboBox$)$;

historyPanel.add$($checkBoxPanel$,$ BorderLayout.NORTH$)$;

historyPanel.add$($scrollPane$,$ BorderLayout.CENTER$)$;

$//$ Panel with buttons

JPanel buttonPanel $=$ new JPanel$()$;

JButton addVoucherButton $=$ new JButton$("$Add Voucher"$)$;

JButton saveVouchersButton $=$ new JButton$("$Save Vouchers"$)$;

JButton exitButton $=$ new JButton$("$Exit$")$;

$//$ Add action listener for exit button

exitButton$\mathrm{.}1\mathrm{.}8$

$(1)($e $->$ System. exit$(0))$;public void actionPerformed$($ActionEvent e$)\{$

ageComboBox.setEnabled$($pensionerCheckBox$.$ is Selected $())$;

$\}$

$\})$;

$//$ Display the frame

$1.$S

$\})$;

$1\mathrm{.}1$C

$(1)$

$\}$

$84$

B$5$

Voucher Application

Voucher Code $,$ Voucher $2$: CODE$21$ Are you a pensioner?