java.util.regex.Matcher.lookingAt() Method



The java.time.Matcher.lookingAt() method attempts to match the input sequence, starting at the beginning of the region, against the pattern.


Following is the declaration for java.time.Matcher.lookingAt() method.

public boolean lookingAt()

Return Value

true if, and only if, a prefix of the input sequence matches this matcher's pattern.


The following example shows the usage of java.time.Matcher.lookingAt() method.

package com.tutorialspoint;

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

public class MatcherDemo {
   private static final String REGEX = "foo";
   private static final String INPUT = "fooooooooooooooooo";
   private static Pattern pattern;
   private static Matcher matcher;

   public static void main( String args[] ) {
      pattern = Pattern.compile(REGEX);
      matcher = pattern.matcher(INPUT);

      System.out.println("Current REGEX is: "+REGEX);
      System.out.println("Current INPUT is: "+INPUT);

      System.out.println("lookingAt(): "+matcher.lookingAt());
      System.out.println("matches(): "+matcher.matches());

Let us compile and run the above program, this will produce the following result −

Current REGEX is: foo
Current INPUT is: fooooooooooooooooo
lookingAt(): true
matches(): false