Package org.htmlunit.cyberneko.util

Class StringUtils

java.lang.Object
org.htmlunit.cyberneko.util.StringUtils
public final class StringUtils extends Object
String utilities class providing utility functions not covered by third party libraries.

This class contains static utility methods for common string operations used throughout the HtmlUnit NekoHtml parser. It focuses on lightweight, performance-oriented string checks that avoid creating unnecessary String objects or using expensive operations.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    StringUtils()
    Private constructor to prevent instantiation of this utility class.

  • Method Summary

    Modifier and Type
    Method
    Description
    static boolean
    equalsChar(char expected, CharSequence s)
    Checks if the provided character sequence consists of exactly one character that matches the expected character.
    static boolean
    isEmptyString(CharSequence s)
    Checks if the provided character sequence is not null and has zero length.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • StringUtils

      private StringUtils()
      Private constructor to prevent instantiation of this utility class.

  • Method Details

    • isEmptyString

      public static boolean isEmptyString(CharSequence s)
      Checks if the provided character sequence is not null and has zero length.

      This method differs from org.apache.commons.lang3.StringUtils#isEmpty(CharSequence) in that it returns false if the provided string is null.

      Parameters:
      s - the character sequence to check, may be null
      Returns:
      true if the sequence is not null AND has length of zero; false otherwise

    • equalsChar

      public static boolean equalsChar(char expected, CharSequence s)
      Checks if the provided character sequence consists of exactly one character that matches the expected character.

      This is an optimized equality check for single-character strings, avoiding the overhead of full string comparison. It's particularly useful during HTML parsing when checking for single-character tokens or delimiters.

      Parameters:
      expected - the character that we expect to match
      s - the character sequence to check, may be null
      Returns:
      true if and only if the provided sequence is not null, has exactly one character, and that character equals the expected character; false otherwise