Could Java be used for a Javanese word processor?

A good answer might be:

Yes.

Reader is an abstract class from which all character-oriented input streams are derived. All these streams are aimed at delivering 16-bit char data to a program, although the source of the data may be in a different format (such as UTF format on a disk file). The diagram shows several Reader classes.

All these classes are character-oriented, input streams. Don't think you have to memorize these classes. Only a few will be discussed in these notes. We will be especially interested in FileReader.

QUESTION 9:

What (do you think) is the source of data for a FileReader?