Java How to Program, Early Objects, 11th Edition

... fibonacci(%d)%n", n);
61         timeData.start = Instant.now();
62         long fibonacciValue = fibonacci(n);
63         timeData.end = Instant.now();
64         displayResult(n, fibonacciValue, timeData);
65         return timeData;
66      }
67
68      // recursive method fibonacci; calculates nth Fibonacci number
69      private static long fibonacci(long n) {
70         if (n == 0 || n == 1) {
71            return n;
72         }
73          else {
74             return fibonacci(n - 1) + fibonacci(n - 2);
75          }
76       }
77
78       // display fibonacci calculation result and total calculation time
79       private static void displayResult(
80          int n, long value, TimeData timeData) {
81
82          System.out.printf(" fibonacci(%d) = %d%n", n, value);
83          System.out.printf(
84             "  Calculation time for fibonacci(%d) = %.3f seconds%n",
85             n, timeData.timeInSeconds());
86       }
87
88 ...