Why sometimes when I check whether a character is a digit by method isDigit in java, I get error?

Question

If I have

Character.isDigit('53')

I get error

but if I have:

Character.isDigit('5')

I get a boolean value of TRUE.

Why is that so?

if you want to check is 53 number or not look this http://stackoverflow.com/questions/1102891/how-to-check-if-a-string-is-a-numeric-type-in-java — Madhawa Priyashantha, Oct 03 '14 at 01:55

score 3 · Answer 1 · answered Oct 03 '14 at 01:46

3

'5' is a character. '53' is not a character.

Or, to look at it in terms of strings, "5" is a string with one character in it ('5'), and "53" is a string with two characters in it ('5', '3').

answered Oct 03 '14 at 01:46

C. K. Young

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score 0 · Answer 2 · answered Oct 03 '14 at 01:48

0

A character is a single symbol. This means that '5' is a character, but since '53' has two symbols, it is not a character.

answered Oct 03 '14 at 01:48

Code-Apprentice

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Moni · Answer 3 · 2014-10-03T05:57:28.180

0

'5' and '53' both represent as a string where first contain a character and second contain two character.

edited Oct 03 '14 at 05:57

answered Oct 03 '14 at 05:52

Moni

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Why sometimes when I check whether a character is a digit by method isDigit in java, I get error?

3 Answers3