Question

我收到错误

＆＃34;线程中的异常＆＃34; main＆＃34; java.util.InputMismatchException at java.util.Scanner.throwFor（Scanner.java:909）at java.util.Scanner.next（Scanner.java:1530）at java.util.Scanner.nextInt（Scanner.java:2160）at java.util.Scanner.nextInt（Scanner.java:2119）at SearchArray.main（SearchArray.java:10）＆＃34;

当我运行此代码时。谁能告诉我我做错了什么？

import java.util.Scanner;
public class SearchArray {
    public static void main (String args[]){
        //imput array size
        //imput array digits
        //imput element to search for

        Scanner scan = new Scanner(System.in);
        int size = scan.nextInt();
        double array[] = new double[size];

        for(int i = 0; i <= array.length-1; i++){
           array[i] = scan.nextDouble();
        }

        double digit = scan.nextDouble();
        boolean bool = findElement(array,digit);

        if(bool == true){
           System.out.println(digit + " was found in the array");
        }else if(bool == false){
           System.out.println(digit + " was NOT found in the array");
        }
    }

    public static boolean findElement(double[] array, double digit){
        boolean bool = false;
        //accepts double array, double  & returns boolean
        //check if numnber entered is in the array

        for(int i = 0; i <= array.length-1; i++){
            if(array[i] == digit){
               bool = true;
            }else{
               bool = false;
            }
        }

        return bool;
    } 
}

Answer 1

公共课InputMismatchException 由扫描程序抛出，表示检索到的令牌没有匹配预期类型的模式，或者令牌不在预期类型的范围。

请看一下这个答案：https://stackoverflow.com/a/14027583/7421645并尝试了解您获得例外的原因，例如试着捕捉异常：

try {
    // ...
} catch (InputMismatchException e) {
    System.out.print(e.getMessage()); //try to find out specific reason.
}

我首先尝试将测试数据输入为String，至少在您确定预期输入提供预期输出之前。

String input = "1 fish 2 fish red fish blue fish";
Scanner s = new Scanner(input);

为什么我会收到此错误？（双数组方法）

1 个答案: