String Regex Methods
Posted on: July 26, 2006 at 12:00 AM
Posted on: July 26, 2006 at 12:00 AM
In addition the the Pattern and Matcher classes, there is some support for regular expressions in the String class.
Java: String Regex Methods
In addition the the Pattern and Matcher classes,
there is some support for regular expressions in the String
class.
boolean b;
String s, s2, t;
String regex;
String[] sa;
b = |
s.matches(regex) |
True if regex matches the entire string in s. Same as Pattern.matches(regex, s) |
s2 = |
s.replaceAll(regex, t) |
Returns a new string by replacing each substring in s that matches regex with t |
s2 = |
s.replaceFirst(regex, t) |
Replaces first substring in s that is matched by regex with String t |
sa = |
s.split(regex) |
Breaks s into substrings separated
by regex or terminated by the end.
There is a problem with this though. If the string is terminated
by the separation regex, it will return one extra empty string.
If you're separating elements with whitespace ("\\s+"), you
can call trim() on the subject first.
See the example below. |
sa = |
s.split(regex, count) |