Want to match the beginning of the input using Java RegEx? You can match the beginning of the input using the meta character “\\A” using Java programming language.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String args[]) { //Reading String from user System.out.println("Enter a String"); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); String regex = "\\A[0-9]"; //Compiling the regular expression Pattern pattern = Pattern.compile(regex); //Retrieving the matcher object Matcher matcher = pattern.matcher(input); int count = 0; if(matcher.find()) { System.out.println("Match found "); } else { System.out.println("Match not found "); } } } |
Program Output
1 2 3 | Enter a String 12 sample text Match found |
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