Errata 8

From APIDesign

Page 132: Implementation of Playback interface should be named MyPlaybackPrints instead of MyCallbackPrints.

Page 134: There should be append method mentioned (instead of write) in this sentence: "This is reasonable behavior for implementors because those who subclassed Writer have not implemented the new write method."

Page 140: while introducing code for separating API/SPI concerns, after saying "Say the original version of Writer looked like the following:", final Writer's code is shown with one of its methods being "create(java.io.Writer)", which implies java.io.Writer's pre-existence. I am guessing that that method is there for convenience, because otherwise all java.io.Writer's method bodies should have been copied over into an Impl implementation in order to be able to run the sample source code, but for clarity, that method should probably not appear in that paragraph (maybe just in the downloadable source code with comments in its header).