Write a Java Program to Validate PAN No.

Write a Java program to validate PAN No., PAN card number always comes in a specific format like “BJYPP3081R”, Let’s write a Java program to validate the pancard number using regex.

Rules to validate PANCard Number

1. There must be ten characters.
2. The first five letters must be alphabets followed by a four-digit number and ends with an alphabet
3. All alphabets should be in a capital case.

Sample Input and Output to validate PAN No.

• Input consists of a string, which corresponds to the PAN number.
• Output consists of a string – “Valid” or “Invalid”.

Refer sample output for formatting specifications

Sample Input 1:

AHDGS5896I

Sample Output 1:

Valid

Sample Input 2:

OLE124F

Sample Output 2:

Invalid

Write a Java program to validate PAN No

Following are the steps to validate PAN(Permanent Account Number) without regex:

• Input number in string format.
• Convert it into a character array using the toChar() method and pass it to validatePanNo().
• Inside the method, iterate over the character array and check for the following condition
  • First, check the length should be less than 10.
  • The first five characters should be capital letters.
  • The next four should be a number.
  • The last digit should be a capital letter.
• At last, if all the above condition is true then return “Valid”.

package com.date;

import java.util.Scanner;

public class PanNumberValidation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String pan = scanner.next();
        char c[] = pan.toCharArray();
        System.out.println(validatePanNo(c));
    }

    private static String validatePanNo(char[] c) {
        if(c.length!=10){
            return "Invalid";
        }
        for(int i =0;i<10;i++){
            if((i >= 0 && i<=4) && (c[i] < 'A' || c[i] > 'Z')){
                return "Invalid";
            }
            else if((i > 4 && i <=8) && (c[i] < 48 || c[i] > 57)){
                return "Invalid";
            }
            else if(i==9 && (c[i] < 'A' || c[i] > 'Z')){
                return "Invalid";
            }
        }
        return "Valid";
    }
}

Output

Java program to validate PAN No using regex.

Following are the steps to validate PAN(Permanent Account Number) no.:

• Input a String.
• Pass the string to the getValues() method.
• Inside the method, create a regex pattern for PAN no as shown below. 

regex_pattern = "[A-Z]{5}[0-9]{4}[A-Z]{1}";

• • [A-Z]{5} – It tells us that the first five should be capital letters.
  • [0-9]{4} – Next we should have 4 digits from 0-9.
  • [A-Z]{1} – At last, there should be a capital letter.
• If the string matches with the pattern then print Valid else print Invalid.

package com.demo;

import java.util.*;

public class Main {
public static void main(String[] args) {
System.out.println("Enter PAN No. :");
Scanner sc = new Scanner(System.in);
String s1 = sc.next();
getvalues(s1);
}

public static void getvalues(String s1) {
if (s1.matches("[A-Z]{5}[0-9]{4}[A-Z]{1}")) {
System.out.println("Valid");
} else System.out.println("Invalid");
}
}

Output

Thus, in this way, we validate PAN(Permanent Account Number) with and without a regex pattern in Java.