Java ArrayList - storing inputted integer into an array and printing it

Question

Everything works except it's not giving me what I want. Where it says 'list.add(ln)', all it does is give me a boolean that says true.

Is there any way to store what I wrote from the keyboard into the array then print it out?

  ArrayList<Integer> list = new ArrayList<Integer>();

        ln = 1;     // prime the loop   

        while(ln != 0) { // begin while ln doesnt equal to zero

            System.out.println("\nFor list[" + n + "], enter a number.");
            ln = console.readInt();

            if (ln != 0){ // begin if the input from keyboard does not equal to zero

                System.out.println("Array " + list.add(ln));

                n++;    // update array size                    

            } // end if the input from keyboard does not equal to zero

            else

                System.out.println();

        } // end while ln doesnt equal to zero

Java has a documentation tool called javadoc. Use it when you don't know what JDK methods do. — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Apr 17, 2014 at 4:45
u have Make list of Integar which is basically enter object of Integar. and u have to make for loop to retrieve this list. — Kishan Bheemajiyani
– Kishan Bheemajiyani, Commented Apr 17, 2014 at 4:49

Storm · Accepted Answer · 2014-04-17 05:33:16Z

1

This is because you are adding it on System.out.println which means that you are cheking a boolean that can be either true or false if you can enter it.

If you add it to the list and then print the index it would work:

if (ln != 0)
{ 
    list.add(ln);
    System.out.println("Array " list.get(n));
    n++;                        
}

edited Apr 17, 2014 at 5:33

Storm

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answered Apr 17, 2014 at 5:03

user3539906

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Comments

Niraj Patel · Accepted Answer · 2014-04-17 04:45:40Z

1

You have to iterate through array that you have created..It has already stored what you have entered..method just give acknowledge that it is successfully stored..

 for (int x = 0; x < list.size(); x++)
        {
        System.out.println("Array " +list.get(x)); 
        }

answered Apr 17, 2014 at 4:45

Niraj Patel

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Comments

Sanjay Rabari · Accepted Answer · 2014-04-17 04:52:50Z

1

 ArrayList<Integer> list = new ArrayList<Integer>();
    Scanner sc = new Scanner(System.in);
    do {

       Integer i=sc.nextInt();
       list.add(i);

     }while (i!=0);

answered Apr 17, 2014 at 4:52

Sanjay Rabari

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