Introduction to Java Programming编程题12.3<ArrayIndexOutBoundsException>

最新推荐文章于 2024-06-07 16:03:46 发布

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本文介绍了一个使用Java编写的简单程序，该程序演示了如何处理数组的边界问题，并且能够优雅地捕获并处理诸如输入错误和越界访问等异常情况。

运行结果：

Enter the array's index less than 100: -5 q 111 9
Out of bounds.
Enter the array's index less than 100: qq
Index must be digital.
Enter the array's index less than 100: 5
Index 5: 144

ArrayIndexOutBounds.java

import java.util.InputMismatchException;
import java.util.Scanner;

public class ArrayIndexOutBounds {
    public static void main(String[] args) {
        int[] a = new int[100];
        for (int i = 0; i < 100; i++) {
            a[i] = (int) (Math.random() * 200);
        }
        Scanner input = new Scanner(System.in);
        boolean n = true;
        do {
            System.out.print("Enter the array's index less than 100: ");
            try {
                int index = input.nextInt();
                if (index >= 0 || index < 100) {
                    System.out.println("Index " + index + ": " + a[index]);
                    n = false;
                }
            } catch (InputMismatchException e) {
                System.out.println("Index must be digital.");
            } catch (ArrayIndexOutOfBoundsException e) {
                System.out.println("Out of bounds.");
            }
            input.nextLine();
        } while (n);
    }
}