This essay does not describe an existing computer program, just one that should exist. This essay is about a suggested student project in Java programming. This essay gives a rough overview of how it might work. I have no source, object, specifications, file layouts or anything else useful to implementing this project. Everything I have prepared to help you is right here.
This project outline is not like the artificial, tidy little problems you are spoon-fed in school, when all the facts you need are included, nothing extraneous is mentioned, the answer is fully specified, along with hints to nudge you toward a single expected canonical solution. This project is much more like the real world of messy problems where it is up to you to fully the define the end point, or a series of ever more difficult versions of this project and research the information yourself to solve them.
Everything I have to say to help you with this project is written below. I am not prepared to help you implement it; or give you any additional materials. I have too many other projects of my own.
Though I am a programmer by profession, I don’t do people’s homework for them. That just robs them of an education.
You have my full permission to implement this project in any way you please and to keep all the profits from your endeavour.
Please do not email me about this project without reading the disclaimer above.
StringBuffer (and its single thread variant StringBuilder) is a poor cousin to String that allows changes to the String characters. It is missing all the search and substring methods. Since StringBuffer is final, you can’t simply add the necessary methods. Someone needs to write a completely new StringBuffer (and call it something like StringBuf). They should study Oracle’s code for String and StringBuffer and implement a complete set of StringBuf methods based on Oracle’s general techniques. The StringBuf class should not be final so that others can extend it still further. It might remember the String used to construct it and simply hand that back later if no changes where made, rather than construct a new String. They might extend it with methods cannibalised from the Quoter Amanuensis. You also might take out the synchronisation to make it faster. See the LazyString project.
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