How to parse String in java Given the following JavaChamp Flash Card

Question 148 / 297: Given the following code, what is the expected output?

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

public class Tester {

	public static void main(String[] args) {
	    Pattern p = Pattern.compile("[a-f]\\d+");
	    Matcher m = p.matcher("ab34ef0");
	    while(m.find()) {
		System.out.print(m.start()+" "+m.group());
	    }
	}
}

A 0 ab345 f0

B 0 ab344 ef0

C 1 b35 f0

D 1 b345 f0

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Explanation:

We are looking for a match of not least and not more than one occurrence of a letter between 'a' to 'f' and followed by at least one occurrence of a digit

start() returns the index of the matched literal

group() returns the matched literal

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