Question

首先发布在这里，所以我希望我不要搞砸。

我的任务是让用户输入一个包含10个整数的数组，然后分别输入另一个整数，让程序检索该数字，如果它在数组中，或者如果没有则给出错误。

我无法将输入的整数与数组中的整数进行比较。

这是我的代码的一部分，其余部分在下面找到：

    try{

        System.out.print("Please enter 10 integers to store in an array and then press enter: ");

    for(int index = 0; index < numbers.length; index++)
          numbers[index] = input.nextInt();

    if(numbers.length==10){ //method doesnt work properly if you input over 10 integers, only if you input less
        System.out.print("Thanks for entering 10 integers. Now input an integer to check: ");
        int compare = input.nextInt();

            if(numbers[index] == compare){     //this is where the error is I believe
                System.out.print(compare);     //here too
            }

http://pastebin.com/U5PdJgr6

提前谢谢！

Answer 1

如果您正在使用java-8，则可以使用IntStream

轻松执行此操作

boolean contained = IntStream.of(inputtedNumbers)
                             .anyMatch(x -> x == numberToSearch);

Answer 2

打开

if (numbers[index] == compare) {
    System.out.print(compare);
}

向

boolean found;
for (int number : numbers) {
    found = number == compare;
    if (found) break;
}
if (found) System.out.print(compare);
else throw new Exception("Number Not Found");

PS 您不需要检查以确保numbers.length仍为10.数组的长度始终为final且无法检查变化

Answer 3

package integerarrayexceptions;
import java.util.Scanner;
import java.util.InputMismatchException;

public class IntegerArrayExceptions {

public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    int numbers[] = new int[10];

    try{

        System.out.print("Please enter 10 integers to store in an array and then press enter: ");

    for(int index = 0; index < numbers.length; index++) 
          numbers[index] = input.nextInt(); //The loop only applies to this statement.

    if(numbers.length==10){ 
        System.out.print("Thanks for entering 10 integers. Now input an integer to check: ");
        int compare = input.nextInt();

            for (int index2 = 0; index2 < numbers.length; index2++) {
                if(numbers[index2] == compare){
                System.out.print(compare);     
            }
            }

    }   
    }
    catch (InputMismatchException MismatchException)
    {
        System.out.print("One or more values entered is not an integer.");
    }   

}

}

Answer 4

您尝试使用变量＆＃34; index＆＃34; ＆＃34; for＆＃34;循环，它不存在......

Answer 5

输入比较值后，有一个循环缺失：

for (index = 0; index < numbers.length; index++) {     
   if(numbers[index] == compare){
      System.out.print(compare);
   }
]

检查数组中的特定整数

5 个答案: