Java Regular Expressions

Regular expression generally used to manipulate text string such as finding and replacing text of given string etc. That is very useful mechanism which can search and replace particular text pattern in long text string.

//For Pattern and Matcher
import java.util.regex.*; 

public class Test {

  public static void main(String args[]) 
  { 
    //Create object to search Pattern
    Pattern pattern = Pattern.compile("Code"); 

    Matcher match = pattern.matcher("Java Code VS Python Code"); 
    
    //Display pattern location
    while(match.find()){
      System.out.println("Pattern Exist from " + 
        match.start() + " to " + (match.end()-1)); //View position
    } 
  } 
}

Pattern Exist from 5 to 8
Pattern Exist from 20 to 23

java.util.regex.Pattern Public Method

java.util.regex.Matcher public method

java.util.regex.PatternSyntaxException public method