java - 循环键盘输入时出错

Question

我有一个循环，应该将信息存储到对象数组中，但由于某种原因，它总是跳过第一个输入。

public class GerbilData {
public static void main(String[] args){
    Scanner keyboard = new Scanner(System.in);

    System.out.println("How many different food items do the gerbils eat?");

    int n1 = keyboard.nextInt();
    Food[] gerbilFood = new Food[n1];
    String temp;
    int temp2;
    int count = 1;

    for (int a = 0; a < n1; a++){
        gerbilFood[a] = new Food();
    }

    int j = 0;
    while (j < n1){
        System.out.println("Name of food item " + count + ":");
        temp = keyboard.nextLine();
        gerbilFood[j].setName(temp);
        count++;
        j++;
    }

Answer 1

keyboard.nextInt() 仅从键盘读取整数，而不读取返回字符。因此，当您第一次调用 keyboard.nextLine() 时，您将获得 getInt() 的 \n。

试试这个:

int n1 = keyboard.nextInt();
keyboard.nextLine();