Pattern matcher example – Part 2

Byron KiourtzoglouNovember 11th, 2012Last Updated: August 19th, 2013

0 34 1 minute read

This is an example of how to use a Pattern Matcher to match an input String with a specified pattern. Matching a String to a pattern with a Matcher implies that you should:

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.

Let’s take a look at the code snippet that follows:

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 pattern = Pattern.compile("(\\w+)\s(\\d+)");
 
  Matcher m = pattern.matcher("Bananas 123");
 
  m.lookingAt();
 
  System.out.println("Name: " + m.group(1));
 
  System.out.println("Number: " + m.group(2));
    }
}