The lookingAt() method of Matcher Class attempts to match the pattern partially or fully in the matcher. It returns a boolean value showing if the pattern was matched even partially or fully starting from the start of the pattern.
Syntax:
public boolean lookingAt()
Parameters: This method do not takes any parameter.
Return Value: This method returns a boolean value showing if a prefix of the input sequence matches this matcher’s pattern.
Below examples illustrate the Matcher.lookingAt() method:
Example 1:
// Java code to illustrate lookingAt() 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 possible result // using lookingAt() method System.out.println(matcher.lookingAt()); }} |
Output:
true
Example 2:
// Java code to illustrate lookingAt() 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 possible result // using lookingAt() method System.out.println(matcher.lookingAt()); }} |
Output:
true
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/regex/Matcher.html#lookingAt–
