使用Java中的掃描程序類將值插入兩個數組

Question

import java.util.Scanner;
public class Demo3 
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter how many friends: ");
        int numOfFriends = Integer.parseInt(scan.nextLine());
        String arrayOfNames[] = new String[numOfFriends];
        long income[] = new long[numOfFriends];
        for (int i = 0; i < arrayOfNames.length; i++) 
        {
            System.out.print("\nEnter the name of friend " + (i+1) + " : ");
            arrayOfNames[i] = scan.nextLine();
            for(int j = 0; j<arrayOfNames.length;j++)
            {
                System.out.print("\nEnter the income of friend " + (j+1) + " : ");
                income[j] = scan.nextLong();
            }
        }
    }
}

這是我的代碼，我想從用戶那里獲取輸入名稱，然后從該人的收入中獲取，然后再獲取另一個人的名稱。上面的代碼未正確排列，我認為for循環中的問題示例輸出應為：

Enter how many friends: 2
Enter name of friend 1 : #############
Enter income of friend 1 : ############## 
Enter name of friend 2 : #############
Enter income of friend 2 : ##############

Answer 1

您應該將內部for循環取出。

import java.util.Scanner;
public class Demo3
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter how many friends: ");
        int numOfFriends = Integer.parseInt(scan.nextLine());
        String arrayOfNames[] = new String[numOfFriends];
        long income[] = new long[numOfFriends];
        for (int i = 0; i < arrayOfNames.length; i++)
        {
            System.out.print("\nEnter the name of friend " + (i+1) + " : ");
            arrayOfNames[i] = scan.nextLine();
        }
        for(int j = 0; j<arrayOfNames.length;j++)
        {
            System.out.print("\nEnter the income of friend " + (j+1) + " : ");
            income[j] = scan.nextLong();
        }
        scan.close();
    }
}

此外，如果要按順序輸入它們，則只需使用一個for循環

import java.util.Scanner;
public class Demo3
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter how many friends: ");
        int numOfFriends = Integer.parseInt(scan.nextLine());
        String arrayOfNames[] = new String[numOfFriends];
        long income[] = new long[numOfFriends];
        for (int i = 0; i < arrayOfNames.length; i++)
        {
            System.out.print("\nEnter the name of friend " + (i+1) + " : ");
            arrayOfNames[i] = scan.nextLine();
            System.out.print("\nEnter the income of friend " + (i+1) + " : ");
            income[i] = scan.nextLong();
            scan.nextLine();
        }
        scan.close();
    }
}

---

附帶說明，不要忘記在完成任務后close()掃描器。