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POStuck in while loop when trying to validate a string input
 

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  1. POStuck in while loop when trying to validate a string input
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    <p>So I am trying to take an input for date of birth in the from of DD/MM/YYYY the input cannot exceed 10 characters in length and I must make sure it is in the proper format to avoid the user inputting something like A51/1/1982, I think I have it written correctly at least to my knowledge :) but I am now forever stuck in the while loop when checking the input</p> <pre><code> System.out.println("Please enter your date of birth in the format DD/MM/YYYY"); dateOfBirth = scanner.nextLine(); //Read date of birth dob0 = dateOfBirth.substring(0);// to check char 0 is between 0-3 dob1 = dateOfBirth.substring(1);// to check char 1 is between 0-9 dob2 = dateOfBirth.substring(2);// to check char 2 is between / dob3 = dateOfBirth.substring(3);// to check char 3 is between 0-1 dob4 = dateOfBirth.substring(4);// to check char 4 is between 0-9 dob5 = dateOfBirth.substring(5);// to check char 5 is between / dob6 = dateOfBirth.substring(6);// to check char 6 is between 1-2 dob7 = dateOfBirth.substring(7);// to check char 7 is between 0-9 dob8 = dateOfBirth.substring(8);// to check char 8 is between 0-9 dob9 = dateOfBirth.substring(9);// to check char 9 is between 0-9 dob = dateOfBirth.length(); //convert string to int to check length while (dob !=10 || !dob0.matches("[0-3]+") || !dob1.matches("[0-9]+") || !dob2.matches("[/]+") || !dob3.matches("[0-1]+") || !dob4.matches("[0-9]+") || !dob5.matches("[/]+") || !dob6.matches("[1-2]+") || !dob7.matches("[0-9]+") || !dob8.matches("[0-9]+") || !dob9.matches("[0-9]+"))//check all values { System.out.println("Please make sure you enter your date of birth in the format DD/MM/YYYY"); dateOfBirth = scanner.nextLine(); } </code></pre> <p>I am guessing I have probably gone the long away around this bue any help would be appreciated :)</p> <p>Thanks</p>
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