When you execute the CompareLoopTimes program shown in Figure 6-29, you will occasionally see a negative number output when the nanoseconds values retrieved fall in different seconds. Modify the program to fix this problem, and save the file as CompareLoopTimes3.java. (Hint: It might take hundreds or thousands of executions for you to “catch” the program near the end of a second in order to test your modifications. For testing purposes, you can assign values to the start and stop times instead of retrieving them from the LocalDateTime class.)

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import java.time.*; public class CompareloopTimes { public static void main (String[] args) { int startTime, endTime; final int REPEAT = 100_000; final int FACTOR = 1_000_000; LocalDateTime now; now = Loca1DateTime.now(); startTime = now.getNano(%; for (int x = 0; x <= REPEAT; ++x) for (int y = 0; y <= REPEAT; ++y); now = LocalDateTime.now (); endTime = now.getNano (); System.out.println("Time for loops starting from 0: "+ ((endTime - startTime) / FACTOR) + " milliseconds"); now = LocalDateTime.now (); startTime = now.getNano(); for (int x = REPEAT; x >= 0; --x) for (int y = REPEAT; y >= 0; --y); now = LocalDateTime.now(); endTime = now.getNano (); System.out.println("Time for loops ending with 0: ((endTime - startTime) / FACTOR) + " milliseconds"); } } Figure 6-29 The CompareLoopTimes application