help me correct this code: import javax.swing.JOptionPane;

public class RentalDemo $\{$

private static int minutes;

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

Rental rentals$[]=$ new Rental$[4]$;

for $($int i $=0$; i $<$ rentals.length; i$++)\{$

String contactNumber $=$ JOptionPane.showInputDialog$($null$,$ "Enter contract number: $",$ "Sammy's Seashore Supplies", $3)$;

rentals$[$i$]=$ new Rental$($contactNumber$,$ minutes$)$;

int minutes $=0$;

while $($minutes $<60||$ minutes $>7200)\{$

minutes $=$ Integer.parseInt$($JOptionPane$.$showInputDialog$($null$,$ "Enter the number of minutes $(60-7200)$: $",$ "Sammy's Seashore Supplies", $3))$;

$\}$

String output $=$ "Contract Number: $"+$ rentals$[$i$].$getContractNumber$()$;

output $=$ output $+"$

Time: $"+$ rentals$[$i$].$getHours$()+"$ hours and $"+$ rentals$[$i$].$getMinutes$()+"$ minutes";

output $=$ output $+"$

Total Price: $$"+$ rentals$[$i$].$getPrice$()$;

JOptionPane.showMessageDialog$($null$,$ output, "Sammy's Seashore Supplies", $1)$;

if $($i $==2)\{$

int hours $=$ rentals$[2].$getHours$()$;

for $($int j $=0$; j $<$ minutes; j$++)\{$

JOptionPane.showMessageDialog$($null$,$ "Coupon good for $10$ percent off next rental", "Sammy's Seashore Supplies $",1)$;

$\}$

$\}$

$\}$

$\}$

$\}$