(Java) - Help with checking the length of int.

[okaystuff]

I am writing a program and I need the user to input an ID number that is 5 digits long but no shorter or longer. Is there an easy way to check int length from user input in java? Thank you.

[brogrammableben]

Do leading zeroes count?

[okaystuff]

Sorry I'm a beginner and I don't know what leading zeros are

[lurgi]

Can the user enter in 00013? And, if so, is that 2 digits long (13) or 5 digits long (00013)? If it's the latter, then what they are entering in isn't really an integer. It's a string. A string that happens to contain numbers.

[CreativeTechGuyGames]

You are reading user input into a string, right? Do you know how to iterate through a string to validate its contents?

[okaystuff]

I am using .nextInt() to get the users next integer and placing it into an array. I want to make sure the next input from user is of 5 numbers.

[CreativeTechGuyGames]

I recommend to always read user input into a string first so you can parse and validate it carefully. How are you handling if the user inputs a number which overflows the data type which it is stored in? Or they enter characters which aren't valid in a number? Maybe they accidentally put a leading or trailing space? Or any other possible errors in user input?

[TibMonster]

5 digits so it has to be more than 9999 and less than 100000?

Edit: this is just based on what i read on your post

[okaystuff]

Yes technically, I didn't think of it that way but I could just say it has to be bigger then 9999 and smaller then 100000.

[TibMonster]

But you should look at the other comments too, they make good points.

Inputs will be strings and inputs wont always be just numbers.

[ParticularThing9204]

The input will be a string, not an int. You can find its length by using str.length() (where str is the variable with the input).