In this assignment you will use regular expression

How to validate time in $24-$hour format using Regular Expression

Given a string str$,$ the task is to check whether the string is valid time in $24-$hour format or not

by using Regular Expression.

The valid time in the $24-$hour format must satisfy the following conditions.

$1.$ It should start from $0-23$ or $00-23.$

$2.$ It should be followed by a $$:$\text{'}($colon$).$

$3.$ It should be followed by two digits from $00$ to $59.$

$4.$ It should not end with $$am$,$pm$$ or $$AM$,$PM$.$

Examples:

Input: str $=13$:$05$

Output: true

Explanation: The given string satisfies all the above mentioned conditions.

Input: str $=02$:$15$

Output: true

Explanation: The given string satisfies all the above mentioned conditions.

Input: str $=24$:$00$

Output: false

Explanation: The given string doesn$$t be in the range of $0-23$ or $00-23($i$.$e$.,$ hour is out of

range$),$ therefore it is not a valid time in $24-$hour format.

Input: str $=10$:$60$

Output: false

Explanation: The given string doesn$$t be in the range of $00$ to $59($i$.$e$.,$ minute is out of range$),$

therefore it is not a valid time in $24-$hour format.

Input: str $=10$:$15$ PM$$

Output: false

Explanation: The given string end with $$AM$$ or $$PM$,$ therefore it is not a valid time in $24-$hour

format.

Note : You are recommended to use Java