[MSheraz]

In general, the UK postcode format is one of "A9 9AA", "A99 9AA", "AA9 9AA", "AA99 9AA", "A9A 9AA" or "AA9A 9AA", where A is an alphabetic character and 9 is a numeric character.

Write a Java program to validate postcode input for each of these formats.

Hints:

Convert each format into a regular expression;
Write a Java class (test-bed prototype) with these regular expressions as constant strings;
Use the method String.matches() to check if the input string matches the first regular expression, in which case print a confirmation message, e.g.
if ("BD7".matches("[A-Z]{2}[0-9]")) System.out.println("valid postcode");
Add code to validate and confirm matches to each of the formats.

How many of your regular expressions are matched by the postcode "BD7 1DP" ?

 package validatingpostcodes;

import java.util.Scanner;

public class ValidatingPostcodes {

    public static void main(String[] args) {
    
        Scanner sc = new Scanner(System.in);
    
        System.out.println("Please enter a Postcode:");
   
        while (!sc.hasNext("[A-Z]{2}[0-9]" )) {
                
            System.out.println("Invalid!");
        sc.next();
    }
    
        String Postcode = sc.next();
    System.out.println("Valid Postcode");
    }} 

Thats how far I have got to and now im totally lost Help Please!

[CasiOo]

First of all you are told to use String.matches(String regex) not a Scanner.

You can use \d for a digit and \w for a word character.

[Martyr2]

Re-read the instructions. It told you to use the matches() method from the string class to determine if the pattern matches. Read in the string, give it to a string variable. Use that string variable to execute matches() and test it against each pattern.


http://docs.oracle.c...va.lang.String)

http://www.tutorials...ing_matches.htm

[MSheraz]

Stupid me lol
But i have never used String.matches().. so any suggestions?
and thanks

Stupid me lol
But i have never used String.matches().. so any suggestions?
and thanks

[CasiOo]

MSheraz, on 18 July 2012 - 06:12 PM, said:

Stupid me lol
But i have never used String.matches().. so any suggestions?
and thanks

Stupid me lol
But i have never used String.matches().. so any suggestions?
and thanks

What exactly do you need help with? Look the method up in the java SE API if you are unsure what the method looks like

This can get you started I hope

"BD7 1DP".matches("regex1");
"BD7 1DP".matches("regex2");
"BD7 1DP".matches("regex3");
"BD7 1DP".matches("regex4");

[MSheraz]

It fine I have got it. Thank for the help