Interface CharSequence

All Known Implementing Classes:
String, StringBuffer, StringBuilder
public interface CharSequence
This interface represents an ordered set of characters and defines the methods to probe them.

  • Method Summary

    Modifier and Type
    Method
    Description
    char
    charAt(int index)
    Returns the character at the specified index, with the first character having index zero.
    int
    length()
    Returns the number of characters in this sequence.
    CharSequence
    subSequence(int start, int end)
    Returns a CharSequence from the start index (inclusive) to the end index (exclusive) of this sequence.
    String
    toString()
    Returns a string with the same characters in the same order as in this sequence.

  • Method Details

    • length

      int length()
      Returns the number of characters in this sequence.
      Returns:
      the number of characters.

    • charAt

      char charAt(int index)
      Returns the character at the specified index, with the first character having index zero.
      Parameters:
      index - the index of the character to return.
      Returns:
      the requested character.
      Throws:
      IndexOutOfBoundsException - if index < 0 or index is greater than the length of this sequence.

    • subSequence

      CharSequence subSequence(int start, int end)
      Returns a CharSequence from the start index (inclusive) to the end index (exclusive) of this sequence.
      Parameters:
      start - the start offset of the sub-sequence. It is inclusive, that is, the index of the first character that is included in the sub-sequence.
      end - the end offset of the sub-sequence. It is exclusive, that is, the index of the first character after those that are included in the sub-sequence
      Returns:
      the requested sub-sequence.
      Throws:
      IndexOutOfBoundsException - if start < 0, end < 0, start > end, or if start or end are greater than the length of this sequence.

    • toString

      String toString()
      Returns a string with the same characters in the same order as in this sequence.
      Overrides:
      toString in class Object
      Returns:
      a string based on this sequence.