The pattern() method of Matcher Class is used to get the pattern to be matched by this matcher.
Syntax:
public Pattern pattern()
Parameters: This method do not accepts any parameter.
Return Value: This method returns a Pattern which is the pattern to be matched by this Matcher.
Below examples illustrate the Matcher.pattern() method:
Example 1:
// Java code to illustrate pattern() method  import java.util.regex.*;  public class GFG {    public static void main(String[] args)    {          // Get the regex to be checked        String regex = "Geeks";          // Create a pattern from regex        Pattern pattern            = Pattern.compile(regex);          // Get the String to be matched        String stringToBeMatched            = "GeeksForGeeks";          // Create a matcher for the input String        Matcher matcher            = pattern.matcher(stringToBeMatched);          // Get the Pattern using pattern() method        System.out.println("Pattern: "                           + matcher.pattern());    }} |
Output:
Pattern: Geeks
Example 2:
// Java code to illustrate pattern() method  import java.util.regex.*;  public class GFG {    public static void main(String[] args)    {          // Get the regex to be checked        String regex = "GFG";          // Create a pattern from regex        Pattern pattern            = Pattern.compile(regex);          // Get the String to be matched        String stringToBeMatched            = "GFGFGFGFGFGFGFGFGFG";          // Create a matcher for the input String        Matcher matcher            = pattern.matcher(stringToBeMatched);          // Get the Pattern using pattern() method        System.out.println("Pattern: "                           + matcher.pattern());    }} |
Output:
Pattern: GFG
Reference: Oracle Doc
