How to use

indexAndLength

method

in

java.lang.String

/**
 * Returns the character at the specified offset in this string.
 *
 * @param index
 *            the zero-based index in this string.
 * @return the character at the index.
 * @throws IndexOutOfBoundsException
 *             if {@code index < 0} or {@code index >= length()}.
 */
public char charAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return value[offset + index];
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns a string containing a suffix of this string. The returned string
 * shares this string's <a href="#backing_array">backing array</a>.
 *
 * @param start
 *            the offset of the first character.
 * @return a new string containing the characters from start to the end of
 *         the string.
 * @throws IndexOutOfBoundsException
 *             if {@code start < 0} or {@code start > length()}.
 */
public String substring(int start) {
  if (start == 0) {
    return this;
  }
  if (start >= 0 && start <= count) {
    return new String(offset + start, count - start, value);
  }
  throw indexAndLength(start);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}

/**
 * Returns the character at the specified offset in this string.
 *
 * @param index
 *            the zero-based index in this string.
 * @return the character at the index.
 * @throws IndexOutOfBoundsException
 *             if {@code index < 0} or {@code index >= length()}.
 */
public char charAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return value[offset + index];
}

/**
 * Returns the character at the specified offset in this string.
 *
 * @param index
 *            the zero-based index in this string.
 * @return the character at the index.
 * @throws IndexOutOfBoundsException
 *             if {@code index < 0} or {@code index >= length()}.
 */
public char charAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return value[offset + index];
}

/**
 * Returns the character at the specified offset in this string.
 *
 * @param index
 *            the zero-based index in this string.
 * @return the character at the index.
 * @throws IndexOutOfBoundsException
 *             if {@code index < 0} or {@code index >= length()}.
 */
public char charAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return value[offset + index];
}

/**
 * Returns the character at the specified offset in this string.
 *
 * @param index
 *            the zero-based index in this string.
 * @return the character at the index.
 * @throws IndexOutOfBoundsException
 *             if {@code index < 0} or {@code index >= length()}.
 */
public char charAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return value[offset + index];
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns the Unicode code point at the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 0 || index >= length()}
 * @see Character#codePointAt(char[], int, int)
 * @since 1.5
 */
public int codePointAt(int index) {
  if (index < 0 || index >= count) {
    throw indexAndLength(index);
  }
  return Character.codePointAt(value, offset + index, offset + count);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}

/**
 * Returns the Unicode code point that precedes the given {@code index}.
 *
 * @throws IndexOutOfBoundsException if {@code index < 1 || index > length()}
 * @see Character#codePointBefore(char[], int, int)
 * @since 1.5
 */
public int codePointBefore(int index) {
  if (index < 1 || index > count) {
    throw indexAndLength(index);
  }
  return Character.codePointBefore(value, offset + index, offset);
}