Format Phone Number Indentation using Java

Question

If we have below two formats for phone number in string array.

YYYXXXZZZ , YYY-XXX-ZZZZ

and we want to normalize these phone numbers to :

XXX-YYY-ZZZZ.

How can we do it?

You want to normalize a 9 or 10 digit phone number into an 11 digit phone number? Where do those new digits come from? And you want to swap the X and Y blocks? — Andy Turner, Feb 06 '16 at 04:02
A similar question was answered [here.](http://stackoverflow.com/questions/5114762/how-do-format-a-phone-number-as-a-string-in-java) — RoninEngineer, Feb 06 '16 at 04:05
@Andy yes on higher level we just want to Swap X and Y Blocks — Tom S, Feb 06 '16 at 04:14

score 0 · Accepted Answer · answered Feb 06 '16 at 04:16

Just extract the substrings based upon the detected format.

if (!p.contains("-")) {
  normalized = p.substring(3, 6) + "-" + p.substring(0, 3) + "-" + p.substring(6);
} else {
  normalized = p.substring(4, 7) + "-" + p.substring(0, 3) + "-" + p.substring(8);
}

Kartik Chugh · Answer 2 · 2016-02-06T05:12:24.313

0

I believe you accidentally inserted an extra "Y" for your expected result. EDIT: It has been corrected

public void formatNumber (String number) {
  String formatted=number.substring(3,6)+"-"+number.substring(0,3)+"-"+ number.substring(6);
  return formatted;
}

edited Feb 06 '16 at 05:12

answered Feb 06 '16 at 04:54

Kartik Chugh

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Format Phone Number Indentation using Java

2 Answers2