Define a class to accept the gmail id and check for its validity.

A gmail id is valid only if it has:

→ @

→ .(dot)

→ gmail

→ com

Example: icse2024@gmail.com is a valid gmail id

A university student's registration number follows the format:

<CourseCode><Year><CollegeCode><RollNumber>

where

Component	Description
CourseCode	A 3-letter code representing the course (e.g., CSE for Computer Science, ECE for Electronics & Communication)
Year	The last two digits of the admission year.
CollegeCode	A 3-digit code representing the college
RollNumber	A 4-digit unique student roll number.

Examples

Registration Number	Course Code	Admission Year	College Code	Roll Number
CSE240011023	CSE	24	001	1023
ECE252104297	ECE	25	210	4297
ASE230277259	ASE	23	027	7259

Define a class that accepts a student's registration number as input, extracts the relevant details, and displays them in the specified format.

import java.util.Scanner;

public class KboatStuRegNum
{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter reg. no.: ");
        _______(1)_________
        
        int l = n.length();
        if (l != 12) {
            System.out.println("Invalid reg. no.");
            System.exit(0);
        }   
        
        _______(2)_________
        _______(3)_________
        _______(4)_________
        _______(5)_________
        
        System.out.println("Course Code    : " + cc);
        System.out.println("Admission Year : " + yr);
        System.out.println("College Code   : " + cl);
        System.out.println("Roll Number    : " + rNo);
    }
}

Which of the following returns a value greater than or equal to 0?

Write the output of the following String methods:

String x= "Galaxy", y= "Games";

(a) System.out.println(x.charAt(0)==y.charAt(0));

(b) System.out.println(x.compareTo(y));