Class Slice8

All Implemented Interfaces:
Comparable<UnicodeString>, AtomicMatchKey

public class Slice8 extends UnicodeString
A Unicode string consisting entirely of 8-bit characters, implemented as a range of an underlying byte array
  • Constructor Details

    • Slice8

      public Slice8(byte[] bytes, int start, int end)
      Create a slice of an underlying byte array
      Parameters:
      bytes - the byte array, containing Unicode codepoints in the range 0-255
      start - the offset of the first character within the byte array
      end - the offset of the first excluded byte, so the length of the string is end-start
  • Method Details

    • length

      public long length()
      Description copied from class: UnicodeString
      Get the length of the string
      Specified by:
      length in class UnicodeString
      Returns:
      the number of code points in the string
    • getWidth

      public int getWidth()
      Description copied from class: UnicodeString
      Get the number of bits needed to hold all the characters in this string
      Specified by:
      getWidth in class UnicodeString
      Returns:
      7 for ascii characters (not used??), 8 for latin-1, 16 for BMP, 24 for general Unicode.
    • getByteArray

      public byte[] getByteArray()
    • getStart

      public int getStart()
    • getEnd

      public int getEnd()
    • indexOf

      public long indexOf(int codePoint, long from)
      Description copied from class: UnicodeString
      Get the position of the first occurrence of the specified codepoint, starting the search at a given position in the string
      Specified by:
      indexOf in class UnicodeString
      Parameters:
      codePoint - the sought codePoint
      from - the position from which the search should start (0-based). A negative value is treated as zero. A position beyond the end of the string results in a return value of -1 (meaning not found).
      Returns:
      the position (0-based) of the first occurrence found, or -1 if not found
    • codePointAt

      public int codePointAt(long index)
      Description copied from class: UnicodeString
      Get the code point at a given position in the string
      Specified by:
      codePointAt in class UnicodeString
      Parameters:
      index - the given position (0-based)
      Returns:
      the code point at the given position
    • substring

      public UnicodeString substring(long start, long end)
      Description copied from class: UnicodeString
      Get a substring of this string, with a given start and end position
      Specified by:
      substring in class UnicodeString
      Parameters:
      start - the start position (0-based): that is, the position of the first code point to be included
      end - the end position (0-based): specifically, the position of the first code point not to be included
      Returns:
      the requested substring
    • indexWhere

      public long indexWhere(IntPredicate predicate, long from)
      Get the position of the first occurrence of the specified codepoint, starting the search at a given position in the string
      Specified by:
      indexWhere in class UnicodeString
      Parameters:
      predicate - condition that the codepoint must satisfy
      from - the position from which the search should start (0-based)
      Returns:
      the position (0-based) of the first codepoint to match the predicate, or -1 if not found
    • codePoints

      public IntIterator codePoints()
      Description copied from class: UnicodeString
      Get an iterator over the code points present in the string.
      Specified by:
      codePoints in class UnicodeString
      Returns:
      an iterator that delivers the individual code points
    • hashCode

      public int hashCode()
      Compute a hashCode. All implementations of UnicodeString use compatible hash codes and the hashing algorithm is therefore identical to that for java.lang.String. This means that for strings containing Astral characters, the hash code needs to be computed by decomposing an Astral character into a surrogate pair.
      Overrides:
      hashCode in class UnicodeString
      Returns:
      the hash code
    • toString

      public String toString()
      Display as a string.
      Overrides:
      toString in class Object