Regular Expression

String

The String class contains support for regular expressions:

Boolean matches;

matches = string.matches(regex);

The following methods support regular expressions:

• matches

• split

• replaceFirst

• replaceAll

Regex Model

The JDK includes classes for regular expressions. These are the Pattern and the Matcher.

The Pattern contains the regular expression, while the Matcher is used to apply said regular expression.

String numbers;
Pattern pattern;
Matcher matcher;
String text;

text = "123";

numbers = "[0-9]*";
pattern = Pattern.compile(numbers);
matcher = pattern .matcher(text);

Now you can work with the matcher.

Boolean matches;

matches = mat.matches();