Tuesday 19 December 2017

How to use lookingAt and matches methods of matcher class | Java Regex | Regex in java


Click here to watch in Youtube : 
https://www.youtube.com/watch?v=u7wp4xPH0QI&list=UUhwKlOVR041tngjerWxVccw

RegexDemo.java

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexDemo
{
    private static final String REGEX = "bar";
    private static final String INPUT = "barooooooooooooooo";

    public static void main(String[] args)
    {
        Pattern pattern = Pattern.compile(REGEX);
        Matcher matcher = pattern.matcher(INPUT);

        System.out.println("REGEX is: " + REGEX);
        System.out.println("INPUT is: " + INPUT);

        /*
         * Returns:true if, and only if, a prefix of the input sequence matches
         * this matcher's pattern.
         */

        System.out.println("lookingAt(): " + matcher.lookingAt());
     
        /*
         * Returns:true if, and only if, the entire region sequence matches this
         * matcher's pattern
         */

        System.out.println("matches(): " + matcher.matches());
    }

}

Output

REGEX is: bar
INPUT is: barooooooooooooooo
lookingAt(): true
matches(): false

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/RegexDemo_lookingAt.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/RegexDemo_lookingAt

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/ef02c9011c18b0aa670526ba89cc11f493b9b854/BasicJava/RegexDemo_lookingAt/?at=master

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