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Java programming Exercises: Matches a string that has a p followed by zero or more q's

Java Regular Expression: Exercise-2 with Solution

Write a Java program that matches a string that has a p followed by zero or more q's.

Sample Solution:

Java Code:

import java.util.Scanner;
public class test {
 
   public static void main(String[] args) {
	   
	    System.out.println(validate("p"));
		System.out.println(validate("pq"));
		System.out.println(validate("pqq"));		
		System.out.println(validate("pqr"));
		System.out.println(validate("prr"));
        }

   public static String validate(String text) {
	   if (text.matches("pq*?"))
                return "Found a match!";
        else
                return "Not matched!";
   }
}

Sample Output:

Found a match!
Found a match!
Found a match!
Not matched!
Not matched!  

Pictorial Presentation:

Java Regular Expression: Matches a string that has a p followed by zero or more q's.
Java Regular Expression: Matches a string that has a p followed by zero or more q's.
Java Regular Expression: Matches a string that has a p followed by zero or more q's.

Flowchart :

Flowchart: Matches a string that has a p followed by zero or more q's.

Java Code Editor:

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Previous: Check whether a string contains only a certain set of characters (a-z, A-Z and 0-9).
Next: Find sequences of lowercase letters joined with a underscore.

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Java: Tips of the Day

Split Java String by New Line

String lines[] = string.split("\\r?\\n");

There's only really two newlines (UNIX and Windows) that you need to worry about.

Ref: https://bit.ly/3dHk7ip