Parallel Streams
For Exercises 23.15–23.17, you may need to create larger data sets to see a significant performance difference.
23.15 (Summarizing the Words in a File) Reimplement Fig. 17.17 using parallel streams. Use the Date/Time API timing techniques you learned in Section 23.12 to compare the time required for the sequential and parallel versions of the program.
23.16 (Summarizing the Characters in a File) Reimplement Exercise 17.9 using parallel streams. Use the Date/Time API timing techniques you learned in Section 23.12 to compare the time required for the sequential and parallel versions of the program.
23.17 (Summarizing the File Types in a Directory) Reimplement Exercise 17.10 using parallel streams. Use the Date/Time API timing ...
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