In this example we shall show you how to use a Matcher and a Pattern in Java to match an input String to a specified pattern. To use a matcher and a pattern one should perform the following steps:
- Compile a String regular expression to a Pattern, using
compile(String regex)API method of Pattern. - Use
matcher(CharSequence input)API method of Pattern to create a Matcher that will match the given String input against this pattern. - Use
lookingAt()API method to match the input sequence, starting at the beginning of the region, against the pattern. - Use
group(int group)API method to get the input subsequence captured by the given group during the previous match operation,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MatcherPatt {
public static void main(String[] args) {
Pattern regex = Pattern.compile("d.*ian");
Matcher m = regex.matcher("darwinian pterodactyls soared over the devonian space");
m.lookingAt();
String res = m.group(0);
System.out.println(res);
}
}
Output:
darwinian pterodactyls soared over the devonian
This was an example of how to use a Matcher and a Pattern in Java.
