6. Write a program that takes a string from the user and validate it. The string should be at least 5 characters and should contain at least one digit. Display an appropriate valid message.

 

import java.util.*;

class ValidateString extends Exception

{

    ValidateString(String s)

    {

        System.out.println("\nString is not valid");

    }

}

class Program6

{

    public static void main(String args[])

    {

        System.out.print("enter a String under 5 Characters and

one character is number: ");

        Scanner sc = new Scanner(System.in);

        String str = sc.next();

       

        char arr[] = str.toCharArray();

       

        try{

        int flag = 0;

        if(str.length() == 5)

        {

            for(int i=0; i<5; i++)

            {

                if(Character.isDigit(arr[i]))

                {

                    flag = 1;

                }

            }

            if(flag == 1)

                System.out.println("String is valid");

            else

                throw new ValidateString(str);

        }

        else

            throw new ValidateString(str);

        }

        catch(Exception e)

        { }

    }

}