C:\jhtp_10th\ch07\fig07_08>java StudentPoll java.lang.ArrayIndexOutOfBoundsException: 14 responses[19] = 14 Rating Frequency 1 3 2 4 3 8 4 2 5 2
StudentPoll.java
// Fig. 7.8: StudentPoll.java // Poll analysis program. public class StudentPoll { public static void main(String[] args) { // student response array (more typically, input at run time) int[] responses = {1, 2, 5, 4, 3, 5, 2, 1, 3, 3, 1, 4, 3, 3, 3, 2, 3, 3, 2, 14}; int[] frequency = new int[6]; // array of frequency counters // for each answer, select responses element and use that value // as frequency index to determine element to increment for (int answer = 0; answer < responses.length; answer++) { try { ++frequency[responses[answer]]; } catch (ArrayIndexOutOfBoundsException e) { System.out.println(e); // invokes toString method System.out.printf(" responses[%d] = %d%n%n", answer, responses[answer]); } } System.out.printf("%s%10s%n", "Rating", "Frequency"); // output each array element's value for (int rating = 1; rating < frequency.length; rating++) System.out.printf("%6d%10d%n", rating, frequency[rating]); } } // end class StudentPoll
Maintained by John Loomis, updated Tue Jan 24 17:11:35 2017