toString() method of a Pattern class used to return the string representation of this pattern. This return the regular expression from which this pattern was compiled.
Syntax:
public String toString()
Parameters: This method accepts nothing as parameter.
Return value: This method returns a string representation of this pattern.
Below programs illustrate the toString() method:
Program 1:
// Java program to demonstrate // Pattern.toString() method import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
// create a REGEX String
String REGEX = "geeks" ;
// create a Pattern using REGEX
Pattern pattern = Pattern.compile(REGEX);
// print pattern
System.out.println( "Pattern:" + pattern);
}
} |
Output:
Pattern:geeks
Program 2:
// Java program to demonstrate // Pattern.toString() method import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
// create a REGEX String
String REGEX = "[* & # $ !]+\\S" ;
// create a Pattern using REGEX
Pattern pattern = Pattern.compile(REGEX);
// print pattern
System.out.println( "Pattern:" + pattern);
}
} |
Output:
Pattern:[* & # $ !]+\S
Reference: https://docs.oracle.com/javase/10/docs/api/java/util/regex/Pattern.html#toString()