A good answer might be:



Class FileWriter is used for output of character data to a disk file. Here is where it is in the hierarchy of Writer classes:

The arrows in this diagram show inheritance (not data flow). A FileWriter is a kind of OutputStreamWriter, which is a kind of Writer, which is a kind of Object. When you read Java documentation, you might need to look at several ancestors of a class you are interested in.


Say that you want the processing that OutputStreamWriter performs. Will you get this with a FileWriter?