Finding word using regular expression

This Example describes the way to find the word from the String using expression. For this we are going to make program named Findone.java.

Finding word using regular expression

Finding word using regular expression

     

This Example describes the way to find the word from the String using expression. For this we are going to make program named Findone.java. The steps involved in program Findone.java are described below:-

Pattern p = Pattern.compile("Java"): Creating a pattern object and compiling the given regular expression into a pattern.

String text = " JavaSun's regex library Java is now Java": Declaring text in which word java is to be find out.

Matcher matcher = p.matcher(text): Creates a matcher for matching the given input against pattern p.

(matcher.find()): This is the method of matcher class which is used for finding the next subsequence of the input sequence and it usually returns a boolean value.

(matcher.group()): This method returns the input matched by the first match

Findone.java

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

public class Findone {
public static void main(String args[]) {
  Pattern p = Pattern.compile("Java");

  String text = " JavaSun's regex library Java is now Java";
  Matcher matcher = p.matcher(text);

  while (matcher.find()) {
  System.out.println(matcher.group());
  }

  }
}

Output of the program:-

Java
Java
Java


DownLoad Source Code

Tutorials

  1. Matching Pattern using Regularexpression
  2. Interchanging String using RegularExpression
  3. Split Demo using RegularExpression
  4. Replacing String using Regularexpression
  5. Print Matchingwords using Regular expression
  6. Listing Directory using Regular expression
  7. Calculating Repetingwords using Regular expression
  8. Retrieving String by using Regular Expression
  9. Retrieving String after given Regular expression
  10. Retrieve the String using expression
  11. Matching Address using regular expressions
  12. Finding a given word using regular expression
  13. Replacing the first subsequence of the input
  14. Pointing last index of the Matcher
  15. Pointing and indicating matcher using regular expression
  16. Finding word using regular expression
  17. Appending and replacing string using regular expression
  18. Split string after each character using regular expression
  19. Reset the matcher using regular expression
  20. Replacing all the text of String using expression
  21. Pattern resetting using regular expression
  22. Match string using regular expression without Case sensitivity
  23. Matching Zip code using regular expression
  24. Finding start and end index of string using Regular expression
  25. Regular Expressions