I have an error with looping inputs in java

Question

I have my code here which simply prompts the user to input the 10 names with their corresponding id number:

import java.util.*;

public class myJava {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    String arr[] = new String [10];
    int arr2[] = new int [10];

    //loop for prompting name and id
    for (int x = 0; x <10; x++)
    { 
        System.out.print("Enter Name: ");
        arr[x] = sc.nextLine();

        System.out.print("Enter ID: ");
        arr2[x] = sc.nextInt();
    }

    //loop for the result
    for (int y = 0; y < 10; y++)
    {
        System.out.println("Name: "+ arr[y]);
        System.out.println("ID: "+ arr2[y]);
    }
}

}

There's no problem with the first loop but in the second loop the program skips to prompt the name and asks for the id. I don't know what's wrong with the code.

This is my Sample Output:

--------------------
Enter Name: User1
Enter ID: 1

Enter Name: Enter ID:

Also found out that it would also work by re-instantiating `sc = new Scanner(System.in);` inside for loop :) — Makudex, Sep 04 '15 at 09:07

singhakash · Accepted Answer · 2015-09-04T14:49:56.030

2

Skip the line after reading int

 System.out.print("Enter Name: ");
 arr[x] = sc.nextLine();

 System.out.print("Enter ID: ");
 arr2[x] = sc.nextInt();
 sc.nextLine();   //will eat up the remaining line left after reading token by above line

because nextInt() consume the token not the whole line

edited Sep 04 '15 at 14:49

answered Sep 04 '15 at 08:57

singhakash

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Thanks! It really worked. – Makudex Sep 04 '15 at 09:04

I have an error with looping inputs in java

1 Answers1