Print Elements of ArrayList in order of input string

Question

What I am trying to do is, get input string from user. Add it into arraylist since i have to play with characters later. But first i want to print contents of ArrayList in order to check what is exactly in their. Here is my code

public static void main(String[] args)
{
    Scanner sc = new Scanner(System.in);
    List <String> Vowels = new ArrayList<String>();
    System.out.println("What is your string? ");
    String abc = sc.nextLine();
    int n = abc.length();
    for(int i=0; i <= n-1 ; i++)
    {
        Vowels.add(sc.nextLine());
    }

    for(int j=0; j< Vowels.size();j++)
        System.out.println(Vowels.get(j));

}

It is not printing anything or not showing up any error. Your help will be highly appreciated.

The sc.nextLine() in your for loop is going to block waiting for user input. Your logic is strange as well I think. If you enter the word "wally" then the for loop is going to require you to enter 5 more lines. Is this right? — Scary Wombat
– Scary Wombat, Commented Mar 12, 2014 at 2:40
Yes yes.. that is exactly what is happening! 5 more lines! How can I resolve that? — Gaurav K.
– Gaurav K., Commented Mar 12, 2014 at 2:42
try writing proper code. The java program is doing exactly what you are asking it to. It is 100% correct. — Scary Wombat
– Scary Wombat, Commented Mar 12, 2014 at 2:44

Baby · Accepted Answer · 2014-03-12 02:55:24Z

4

here is your problem:

for(int i=0; i <= n-1 ; i++)
{
    Vowels.add(sc.nextLine());
               ^
}

"It is not printing anything" because it waiting for your input

What you need is:

public static void main(String[] args)
{
    Scanner sc = new Scanner(System.in);
    List <String> Vowels = new ArrayList<String>();
    System.out.println("What is your string? ");
    String abc = sc.nextLine();
    int n = abc.length();
    for(int i=0; i < n ; i++)
    {
        Vowels.add(new StringBuilder().append("").append(abc.charAt(i)).toString());
    }

    for(int j=0; j< Vowels.size();j++)
        System.out.print(Vowels.get(j));
}

Input : Burger

Output: Burger

If you want your output as [B, u, r, g, e, r], then just do:

System.out.println(Vowels); //without for loop

edited Mar 12, 2014 at 2:55

answered Mar 12, 2014 at 2:34

Baby

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3 Comments

Gaurav K. Over a year ago

I gave input like "Burger". Its not printing after that. I want it to print [B,U,R,G,E,R] or better "Burger" as it is as input.

Gaurav K. Over a year ago

@RafaEl It is working now but it is printing as one character per line.. I want to print it as a string. How that can be done?

Baby Over a year ago

@GauravK. you want to print it in one line? then just use System.out.print(Vowels.get(j));

Scary Wombat · Accepted Answer · 2014-03-12 02:42:04Z

0

Based upon your new requirements as in Rafa El's comments, try

abc = "Burger";          // use abc = sc.nextLine();
int n = abc.length();
for(int i=0; i < n ; i++)
{
    Vowels.add("" + abc.charAt(i));
}

answered Mar 12, 2014 at 2:42

Scary Wombat

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