Java - 使用数组查找最大和最小数字

Question

我应该制作一个程序，从用户输入中获取 10 个数字，找到最大和最小的数字并显示用户的所有输入。这个程序确实使用了一个数组。这是我的代码:

import java.util.Scanner; // program uses Scanner
public class ArrayTester {
    // begin execution
    public static void main(String[] args) {
        // declare and create array object
        // declare smallest and largest int variables 
        int[] numbers;
        numbers = new int[10];
        int smallest = numbers[0], largest = numbers[0];

        // create Scanner object
        Scanner input = new Scanner(System.in);

        // prompt user 
        System.out.print("Please enter 10 numbers: \n");
        // use for loop to obtain user input
        for (int counter = 0; counter < numbers.length; counter++) {
            numbers[counter] = input.nextInt();
        } // end obtaining input

        // enhanced for loop to find largest and smallest values
        for (int i : numbers) {
            if (numbers[i] < smallest) {
                smallest = numbers[i];
            } // end finding smallest
            else if (numbers[i] > largest) {
                largest = numbers[i];
            } // end finding largest number 
        } // end finding largest and smallest values

        // for loop to print user input 
        System.out.printf("%s%8s\n", "Index", "Input");
        for (int counter = 0; counter <= numbers.length; counter++) {
            System.out.printf("%5d%8d\n", counter, numbers[counter]);
        } // end printing input values

        // print smallest and largest numbers
        System.out.printf("Smallest number: %d\nLargest number: %d\n", smallest, largest);
        System.out.print("Programmed by Christian Lapinig");
    } // end main
 } // end ArrayTester

此时我能够获得用户输入，但我遇到了这个问题:

Please enter 10 numbers: 
454
392
33
41
6
44
39
21
12
2
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 454
at ArrayTester.main(ArrayTester.java:32)

我需要一个 try and catch block 来解决这个问题吗？

Answer 1

您的问题与您在其他答案中已经说明的 for 循环的使用方式有关。不过，Java 8 中更短的方法是使用流:

IntStream.of(numbers).max() 和 IntStream.of(numbers).min()