Java缓存String.split正则表达式

Question

We can split a line by a regex like so:

String regex = "[\\p{P} ]+";
String[] split = line.split(regex);

But I was wondering if there is a way to cache the regex into a Pattern :

private static final Pattern PATTERN = Pattern.compile(regex);

Then split using the Pattern , something to this extent:

String[] split = line.split(PATTERN);

Answer 1

Sure, not with String.split , but with Pattern.split you can:

String[] parts = PATTERN.split(line);

But I was wondering if there is a way to cache the regex into a Pattern:

What you really meant was, split by a compiled regex that can be reused.

Answer 2

Use:

String[] split = PATTERN.split(line);

Pattern javadoc

Answer 3

You can use: Pattern#split(String) method like this:

final Pattern p = Pattern.compile("[\\p{P} ]+");

Then use it:

Strig[] arr = p.split(line);