Note: next ・ nextLine (paiza learning Java introduction 9: # 06)

Today I wrote the following code in paiza's Java Primer 9.

Input is below

6 Recovery agents shield crystal crystal sword sword

The output is below

• Successful when 6 images are displayed

//Output images in order
import java.util.*;

public class Main {
    public static void main(String[] args) {
        //Image hash
        HashMap<String, String> itemImages  = new HashMap<String, String>();
        itemImages.put("sword", "http://paiza.jp/learning/images/sword.png ");
        itemImages.put("shield", "http://paiza.jp/learning/images/shield.png ");
        itemImages.put("Recovery agents", "http://paiza.jp/learning/images/potion.png ");
        itemImages.put("crystal", "http://paiza.jp/learning/images/crystal.png ");

        //Write below from here
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
        
        String[] itemOrders = new String[num];
        
        for (int i = 0 ; i < num; i++) {
            itemOrders[i] = sc.next();
        }
        
        for (String itemName : itemOrders) {
            System.out.println("<img src = '" + itemImages.get(itemName) + "'>");
            System.out.println("<br>");
        }
    }
}

Here above

for (int i = 0 ; i < num; i++) {
            itemOrders[i] = sc.next();
        }

Part of

for (int i = 0 ; i < num; i++) {
            itemOrders[i] = sc.nextLine();
        }

Anyway

Read the first "6" of the input value and Maybe because I didn't read the last "sword"

It became like.

If you change the part of nextLine to next

And succeeded.

• Image quote: From paiza https://paiza.jp/works/8nxtlwO8hADExEsUB3PO29UQOrhMK6eR/output.html https://paiza.jp/works/aEjXurY_tyZM-09Y8aqCbLkvgw7p-V9h/output.html Than

As a result of investigating various causes Due to the nature of nextLine, influenced by the previous nextInt It seems that the part of the number read by nextInt was read as a blank.

The reason why I fixed it to next is that unlike nextLine, which recognizes spaces, it is recognized by line breaks. I thought it was because next didn't recognize the part read by nextInt.

... But I don't know if this is there, so if anyone knows it, I would be very grateful if you could tell me ...! !! !! !! !! !! !! !! !! !! !! !! !!