Task $1$: The user will be able to give a string as an argument to the method and the method will return the number of characters in the string $($including white spaces$).$ Complete the method public static int returnTheLengthOfTheString to complete this task. See the method comments for more detail.

Task $2$: The user will be able to give a string and an index position in the string as arguments to the method. The method will return the character located at that index position in the string $($including white spaces$).$ Complete the method public static char returnTheCharacterAtTheGivenIndex to complete this task. See the method comments for more detail.

Task $3$: The user will be able to give a string and an index position in the string as arguments to the method. The method will return the substring starting at that index position in the string $($including white spaces$)$ to the end of the string. Complete the method public static String returnTheSubStringStartingAtTheGivenIndex to complete this task. See the method comments for more detail.

Task $4$: The user will be able to give a string and two index positions in the string as arguments to the method. The method will return the substring starting at the first index position in the string and ending at the second index position in the string$($including white spaces$).$ Complete the method public static String returnTheSubStringBetweenStartAndEndIndex to complete this task. See the method comments for more detail.

Task $5$: The user will be able to give a string as an argument to the method. If there are any occurrences of the substring $"1999"$ in the supplied argument, then the method will return a new string with all occurrences of $"1999"$ changed to $"2022".$ Complete the method public static String changeAllOccurancesOf$1999$To$2022$ to complete this task. See the method comments for more detail.

Task $6$: The user will be able to give a string as an argument to the method. The method will check if the given string matches the valid password regular expression. The method will return true if the pattern matches, false if any password rule is not met. Complete the method public static boolean checkIfPasswdIsValid to complete this task. See the method comments for more detail.

Task $7$: The user will be able to give a string as an argument to the method. The method will match the regular expression pattern for a valid email address and count the number of those valid email addresses that are found in the file. The method will return the number of valid emails found in the string. Complete the method public static int countNumberOfValidEmailAddresses to complete this task. See the method comments for more dpackage a$2\_$strings$\_$and$\_$regex$\_$Jtorres$126$;

public class StringRegExAssignment $\{$

$/*$

$*$ return the length of a given string

$*$ return $-1$ is the string is null

$*/$

public static int returnTheLengthOfTheString$($String word$)\{$

int numberOfCharacters $=$

return $-1$;

$\}$

$/*$

$*$return the character at the given index in word

$*/$

public static char returnTheCharacterAtTheGivenIndex$($String word, int index$)\{$

return $\text{'}\backslash 0\text{'}$;

$\}$

$/*$

$*$ return the substring starting from the given index

$*/$

public static String returnTheSubStringStartingAtTheGivenIndex$($String word, int index$)\{$

return $""$;

$\}$

$/*$

$*$ return the substring from the start index to the end index

$*/$

public static String returnTheSubStringBetweenStartAndEndIndex$($String word, int startIndex, int endIndex$)\{$

return $""$;

$\}$

$/*$

$*$ if there are occurrences of $1999$ in the paragraph, replace with $2022$

$*/$

public static String changeAllOccurancesOf$1999$To$2022($String paragraph$)\{$

return $""$;

$\}$

$/*$

$*$ A valid password has the following pattern

$*-$ starts with an uppercase letter

$*-$ ends with a lowercase letter

$*-$ the second to last character is either a number or $!$

$*-$ the length is at least $8$ but no more than $12$

$*/$

public static boolean checkIfPasswdIsValid$($String passwd$)\{$

return false;

$\}$

$/*$

$*$ For the purposes of this assignment, assume a valid email address has the following pattern

$*-$ four parts:

$*--$ Recipient name $-$ made up of uppercase and lowercase letters, digits $0$ to $9.$ Length at least $1,$ but no more than $32$

$*--$ @ symbol

$*--$ Domain name $-$ made up of uppercase and lowercase letters, digits $0$ to $9.$ Length at least $1,$ but no more than $32$

$*--$ Top$-$level domain $-$ either $.$com or $.$net or $.$edu

$*/$

public static int countNumberOfValidEmailAddresses$($String fileDump$)\{$

return $-1($next is hte code the main method will be reading from$)$ public class StringRegExDriver $\{$

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

System.out.println$($StringRegExAssignment$.$returnTheLengthOfTheString$(""))$; $//0$

System.out.println$($StringRegExAssignment$.$returnTheLengthOfTheString$("$