Question

Language: Java.

Use regular expression to find matches where the word [Pg XX] appears. X is one or more digits. the numbers is what we want saved.

Examples:

hahhaha[Pg XX]

haha [Pg XX]aadjrfrur

and so on

Answer 1

import java.util.*;
import java.util.regex.*;
public class MyClass {
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
String input;
System.out.println("Enter the input string to check:");
input = in.nextLine();
if(Pattern.matches("[a-zA-Z ]*\\[Pg [0-9]+\\][a-zA-Z ]*", input))
System.out.println("The word [Pg XX] appears.");
else
System.out.println("The word [Pg XX] does not appears.");
}
}

Please check the code. If you have any doubts comment below and i am happy to help :)