Class StringCharacterIterator

java.lang.Object
java.text.StringCharacterIterator
All Implemented Interfaces:
Cloneable, CharacterIterator
public final class StringCharacterIterator extends Object implements CharacterIterator
StringCharacterIterator implements the CharacterIterator protocol for a String. The StringCharacterIterator class iterates over the entire String. All constructors throw NullPointerException if text is null.
Since:
1.1
See Also:

  • Field Summary

    Fields declared in interface java.text.CharacterIterator

    DONE

  • Constructor Summary

    Constructors
    Constructor
    Description
    StringCharacterIterator(String text)
    Constructs an iterator with an initial index of 0.
    StringCharacterIterator(String text, int pos)
    Constructs an iterator with the specified initial index.
    StringCharacterIterator(String text, int begin, int end, int pos)
    Constructs an iterator over the given range of the given string, with the index set at the specified position.

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    clone()
    Creates a copy of this iterator.
    char
    current()
    Implements CharacterIterator.current() for String.
    boolean
    equals(Object obj)
    Compares the equality of two StringCharacterIterator objects.
    char
    first()
    Implements CharacterIterator.first() for String.
    int
    getBeginIndex()
    Implements CharacterIterator.getBeginIndex() for String.
    int
    getEndIndex()
    Implements CharacterIterator.getEndIndex() for String.
    int
    getIndex()
    Implements CharacterIterator.getIndex() for String.
    int
    hashCode()
    Computes a hashcode for this iterator.
    char
    last()
    Implements CharacterIterator.last() for String.
    char
    next()
    Implements CharacterIterator.next() for String.
    char
    previous()
    Implements CharacterIterator.previous() for String.
    char
    setIndex(int p)
    Implements CharacterIterator.setIndex() for String.
    void
    setText(String text)
    Reset this iterator to point to a new string.

    Methods declared in class java.lang.Object

    finalize, getClass, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • StringCharacterIterator

      public StringCharacterIterator(String text)
      Constructs an iterator with an initial index of 0.
      Parameters:
      text - the String to be iterated over

    • StringCharacterIterator

      public StringCharacterIterator(String text, int pos)
      Constructs an iterator with the specified initial index.
      Parameters:
      text - The String to be iterated over
      pos - Initial iterator position
      Throws:
      IllegalArgumentException - if pos is not within the bounds of range (inclusive) from 0 to the length of text

    • StringCharacterIterator

      public StringCharacterIterator(String text, int begin, int end, int pos)
      Constructs an iterator over the given range of the given string, with the index set at the specified position.
      Parameters:
      text - The String to be iterated over
      begin - Index of the first character
      end - Index of the character following the last character
      pos - Initial iterator position
      Throws:
      IllegalArgumentException - if begin and end are not within the bounds of range (inclusive) from 0 to the length of text, begin is greater than end, or pos is not within the bounds of range (inclusive) from begin to end

  • Method Details

    • setText

      public void setText(String text)
      Reset this iterator to point to a new string. This package-visible method is used by other java.text classes that want to avoid allocating new StringCharacterIterator objects every time their setText method is called.
      Parameters:
      text - The String to be iterated over
      Throws:
      NullPointerException - if text is null
      Since:
      1.2

    • first

      public char first()
      Implements CharacterIterator.first() for String.
      Specified by:
      first in interface CharacterIterator
      Returns:
      the first character in the text, or DONE if the text is empty
      See Also:

    • last

      public char last()
      Implements CharacterIterator.last() for String.
      Specified by:
      last in interface CharacterIterator
      Returns:
      the last character in the text, or DONE if the text is empty
      See Also:

    • setIndex

      public char setIndex(int p)
      Implements CharacterIterator.setIndex() for String.
      Specified by:
      setIndex in interface CharacterIterator
      Parameters:
      p - the position within the text. Valid values range from getBeginIndex() to getEndIndex(). An IllegalArgumentException is thrown if an invalid value is supplied.
      Returns:
      the character at the specified position or DONE if the specified position is equal to getEndIndex()
      Throws:
      IllegalArgumentException - if p is not within the bounds (inclusive) of getBeginIndex() to getEndIndex()
      See Also:

    • current

      public char current()
      Implements CharacterIterator.current() for String.
      Specified by:
      current in interface CharacterIterator
      Returns:
      the character at the current position or DONE if the current position is off the end of the text.
      See Also:

    • next

      public char next()
      Implements CharacterIterator.next() for String.
      Specified by:
      next in interface CharacterIterator
      Returns:
      the character at the new position or DONE if the new position is off the end of the text range.
      See Also:

    • previous

      public char previous()
      Implements CharacterIterator.previous() for String.
      Specified by:
      previous in interface CharacterIterator
      Returns:
      the character at the new position or DONE if the current position is equal to getBeginIndex().
      See Also:

    • getBeginIndex

      public int getBeginIndex()
      Implements CharacterIterator.getBeginIndex() for String.
      Specified by:
      getBeginIndex in interface CharacterIterator
      Returns:
      the index at which the text begins.
      See Also:

    • getEndIndex

      public int getEndIndex()
      Implements CharacterIterator.getEndIndex() for String.
      Specified by:
      getEndIndex in interface CharacterIterator
      Returns:
      the index after the last character in the text
      See Also:

    • getIndex

      public int getIndex()
      Implements CharacterIterator.getIndex() for String.
      Specified by:
      getIndex in interface CharacterIterator
      Returns:
      the current index.
      See Also:

    • equals

      public boolean equals(Object obj)
      Compares the equality of two StringCharacterIterator objects.
      Overrides:
      equals in class Object
      Parameters:
      obj - the StringCharacterIterator object to be compared with.
      Returns:
      true if the given obj is the same as this StringCharacterIterator object; false otherwise.
      See Also:

    • hashCode

      public int hashCode()
      Computes a hashcode for this iterator.
      Overrides:
      hashCode in class Object
      Returns:
      A hash code
      See Also:

    • clone

      public Object clone()
      Creates a copy of this iterator.
      Specified by:
      clone in interface CharacterIterator
      Overrides:
      clone in class Object
      Returns:
      A copy of this
      See Also: