我正试图解决以下简单的编程练习:“编写一个程序,读取1到10之间的整数并计算每个整数的出现次数,假设输入以0结尾”。我提出了以下解决方案。我不熟悉调试器,并且最近3个小时尝试跟踪ArrayIndexOutOfBoundsException
。也许有人能够看到ArrayIndexOutOfBoundsException
发生在哪里?无法跟踪java.lang.ArrayIndexOutOfBoundsException:
import java.util.Scanner;
public class Exercise07_03 {
/** Main method */
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int[] numbers = new int[10];
System.out.print("Enter up to 10 integers between 1 and 10" +
"inclusive (input ends with zero): ");
int i = 0;
do {
numbers[i] = input.nextInt();
i++;
} while (numbers[i] != 0 && i != 9);
displayCounts(countNumbers(numbers));
}
/** Count the occurrences of each number */
public static int[] countNumbers(int[] numbers) {
int[] counts = new int[10];
for (int i = 0; i < counts.length; i++)
counts[numbers[i] - 1]++;
return counts;
}
/** Display counts */
public static void displayCounts(int[] counts) {
for (int i = 1; i < counts.length + 1; i++)
if (counts[i - 1] != 0)
System.out.println(i + " occurs " + counts[i - 1] + " time");
}
}
ArrayIndexOutOfBoundsException通常发生在你在这里和那里有“一个”错误。如果您在调试程序中遇到问题,那么您可能需要在循环中进行一些打印调试,并确认您的索引实际上是您在任何时间点所认为的。 – orbitbot 2015-03-08 20:20:53