C:\ece538>java StudentPoll2 java.lang.ArrayIndexOutOfBoundsException: Index 14 out of bounds for length 6 Rating Frequency 1 3 2 4 3 8 4 2 5 2 |
StudentPoll2.java
// Fig. 7.8: StudentPoll.java // Poll analysis program, using alternative for loop public class StudentPoll2 { public static void main(String[] args) { // student response array (more typically, input at run time) int[] responses = {1, 2, 5, 14, 3, 5, 2, 1, 3, 3, 1, 4, 3, 3, 3, 2, 3, 3, 2, 4}; 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: responses) { try { ++frequency[answer]; } catch (ArrayIndexOutOfBoundsException e) { System.out.println(e); // invokes toString method } } System.out.printf("%n%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]); } }
Maintained by John Loomis, updated Sat Jan 18 17:06:06 2020