Introduction to Programming

Get code point by index or stream

The following group of methods convert all the String value, or only part of it, into Unicode code points of its characters: 

• IntStream codePoints()
• int codePointAt(int index)
• int codePointBefore(int index)
• int codePointCount(int beginIndex, int endIndex)
• int offsetByCodePoints(int index, int codePointOffset)

We explained Unicode code points in Chapter 5, Java Language Elements and Types. These methods are especially useful when you need to represent characters that do not fit into the two bytes of the char type. Such characters have code points bigger than Character.MAX_VALUE, which is  65535.