String Manipulation in Java: split string after numbers

Question

My string have this form XxYxZx

X , Y and Z are characters and the x are numbers which can vary from 0-999.

I want to split this string in this form. How can this be done?

Xx
Yx
Zx

Example:

 Input:  "A155B45C77D89" 
 Output: "A155", "B45", "C77", "D89"

can you explain exactlay what is your input and what you want output? — Govindarao Kondala
– Govindarao Kondala, Commented Sep 2, 2011 at 12:15
@Andrew, I believe the question is "how do I split a string on the form XxYxZx into Xx, Yx, Zx". — aioobe
– aioobe, Commented Sep 2, 2011 at 12:41
@aioobe I believe in Goblins. But that is as relevant to what the OP's actual (as yet unstated) question is, as speculation. (And questions need a '?') ;) — Andrew Thompson
– Andrew Thompson, Commented Sep 2, 2011 at 12:45
Hehe.. If the guy says, "I want to do this... but I don't know how." can you seriously not figure out what he is "asking"? — aioobe
– aioobe, Commented Sep 2, 2011 at 12:47

aioobe · Accepted Answer · 2011-09-02 12:22:34Z

7

String myString="A155B45C77D89";
String[] parts = myString.split("(?<=\\d)(?=\\p{Alpha})");
System.out.println(Arrays.toString(parts));

Output:

[A155, B45, C77, D89]

Explanation:

String.split works with regular expressions. The regular expression (?<=\d)(?=\p{Alpha}) says "match all substrings preceeded by a digit, succeeeded by a alphabetic character.

In a string such as "A155B45C77D89", this expression is matched by the empty substrings

A155 B45 C77 D89
    ^   ^   ^
  here  |   |
       here |
            |
        and here

edited Sep 2, 2011 at 12:22

answered Sep 2, 2011 at 12:17

aioobe

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stacker · Accepted Answer · 2011-09-02 12:21:31Z

1

public static void main(String[] args) {
        Pattern p = Pattern.compile( "([A-Z])([0-9]+)" );
        Matcher m = p.matcher( "X01Y123Z99" );
        while ( m.find() ) {
            System.out.println( m.group( 1 ) + " " + m.group( 2 ) );
        }
    }

prints

X 01
Y 123
Z 99

answered Sep 2, 2011 at 12:21

stacker

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