CODEWITHSUNDEEP
javastringinttostring
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Reputation: 73

getting a number from a user and making changes and turning it into a string

I am making a math program that guesses the birthday of the user.

The user enters a number lets say : 75622 and i subtract a number from it to get the birthday, in this case 42682 -- 04/26/82

i want to be able to turn that integer into a string and then add the forward slash between the month, day and year.. and also add a 0 if it is only 5 digits and not 6 ( because of the month being 1-9).

I know how to use Integer.toString(int) to turn it into a string, but i do not know how to insert the forward slashes and the zero.

thank you kindly!

Upvotes: 1

Views: 66

Answers (2)

Elliott Frisch
Elliott Frisch

Reputation: 201439

If you just want to convert the int to a String (with a leading 0) you can use String.format like

int num = 42682;
String s = String.format("%06d", num);

You might then use another String.format and String.substring to build your desired output, like

String output = String.format("%s/%s/%s", s.substring(0, 2), 
        s.substring(2, 4), s.substring(4));
System.out.println(output);

Which outputs (as requested)

04/26/82

Upvotes: 3

Devram Kandhare
Devram Kandhare

Reputation: 781

Please find answer below:

public class CreateDateFromNumber {

    public static void main(String[] args) {
        int number = 42682;
        System.out.println(getDate(number));
    }

    public static String getDate(int number) {
        String numberStr = Integer.toString(number);
        String outputStr = "";

        if (numberStr.length() != 5 && numberStr.length() != 6) {
            throw new IllegalArgumentException(
                    "Number should be length of 5 or 6");
        }

        if (numberStr.length() == 5) {
            numberStr = "0" + numberStr;
        }

        int var0 = 0;

        while (var0 < numberStr.length()) {
            String var1 = numberStr.substring(var0, var0 + 2);
            outputStr = outputStr + var1;

            if (var0 + 2 < numberStr.length()) {
                outputStr = outputStr + "/";
            }
            var0 = var0 + 2;
        }
        return outputStr;
    }

}

Upvotes: 1

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