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(Address book) Supplement VI.B has a case study of using random-access files for creating and manipulating an address book. Modify the case study by adding an Update button, as shown in Figure 19.19, to enable the user to modify the address that is being displayed. The application can store, retrieve, and update addresses from a file. Splitfiles) Suppose you want to back up a huge file (e.g., a 10-GB AVI file) to a CD-R. You can achieve it by splitting the file into smaller pieces and backing up these pieces separately. Write a utility program that splits a large file into smaller ones using the following command: java Exercisel9_10 SourceFile numberOfPieces The command creates the files SourceFiIe.1, SourccFile.2,..., SourceFile.n, where n is numberOfPieces and the output files are about the same size. (Split files GUI) Rewrite Exercise 19.10 with a GUI, as shown in Figure 19.20a. (Combine files) Write a utility program that combines the files together into a new file using the following command: java Exercisel9_12 SourceFilel . . . SourceFilen TargetFile The command combines SourceFilel, . . . , and SourceFilen into TargetFile.
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