Java Best Programs

4) Email Validation

   String input1="test@gmail.com"

                1)@ & . should be present;

                2)@ & . should not be repeated;

                3)there should be five charcters between @ and .;

                4)there should be atleast 3 characters before @ ;

                5)the end of mail id should be .com;

package Set3;

import java.util.*;

public class ClassSeT04 {

public static void main(String[] args) {

      String ip="test@gmail.com";

        emailIdValidation(ip);

}

public static void emailIdValidation(String ip) {

     

      boolean b=false;

      StringTokenizer t=new StringTokenizer(ip,"@");

            String s1=t.nextToken();

            String s2=t.nextToken();

      StringTokenizer t1=new StringTokenizer(s2,".");

            String s3=t1.nextToken();

            String s4=t1.nextToken();

      if(ip.contains("@") && ip.contains("."))

            if(s3.length()==5)

                  if(s1.length()>=3)

                        if(s4.equals("com"))

                              b=true;

      if(b==true)

            System.out.println("valid mail Id");

      else

            System.out.println("not a valid Id");

     

}

}