Extract numbers from String using Regex [duplicate]

Question

I have a string such as below:

String str="tile tile-2 tile-position-1-4"

I wish to receive the numbers in an array,such as [2,1,4].

My own solution is to break the string using split, but i am wondering if there is a shortcut using Regx

Thanks to @nitzien with Regx it tried:

String pattern= "^tile tile-(\\d*) tile-position-(\\d*)-(\\d*)$";
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(str);
System.out.println(m.group(0));
System.out.println(m.group(1));
System.out.println(m.group(2));

But, it complains with:

java.lang.IllegalStateException: No match found

try this String[] result =Arrays.stream(str.split("\\D")).filter(s->!s.isEmpty()).toArray(String[]::new); — Ryuzaki L
– Ryuzaki L, Commented Sep 29, 2018 at 19:07

nitzien · Accepted Answer · 2018-09-29 19:12:40Z

1

regex pattern - "^tile tile-(\d*) tile-position-(\d*)-(\d*)$"
replacement - "[\1,\2,\3]"

Replacement is string which you will need to convert to array depending on which language you are using.

Updated answer after edited question

String str="tile tile-2 tile-position-1-4";
String pattern= "^tile tile-(\\d*) tile-position-(\\d*)-(\\d*)$";
System.out.println(str.replaceAll(pattern, "$1,$2,$3"));

This will give

2,1,4

edited Sep 29, 2018 at 19:12

answered Sep 29, 2018 at 18:50

nitzien

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4 Comments

Jeff Over a year ago

i have updated my question, do you have any idea?

nitzien Over a year ago

What is classname in Matcher m = r.matcher(className);?

Jeff Over a year ago

it is str sorry

nitzien Over a year ago

Please check updated answer

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