How do I create an array using user input?

[Misaio]

I'm trying to create a program that prompts the user to put in several different numbers. I'd like to put those numbers into an array for easy use. To save me time on coding, I want to loop the request for user input. Would I use a for loop and use the subscript in the array to make changes as needed? Please help.

[anurag275125]

You should use Scanner class to create an array from user input like this---

import java.util.*;
public class array
{
    public static void main(String args[])
    {
        int[] a=new int[6];
        Scanner sc=new Scanner(System.in);
        System.out.println("Please enter elements...");
        for(int j=0;j<6;j++)
            a[j]=sc.nextInt();
        System.out.println("Array elements are : ");
        for (int i=0;i<a.length;i++)
            System.out.println(a[i]);
    }
}

[Misaio]

Actually, I don't think I'm that far in my Java yet. But what I did find was that I could loop the input and just parse it into a secondary array like this:

    for (x = 0; x < PLACE_HOLDER; ++x)
        {
            stringArray[x] = JOptionPane.showInputDialog(null, "Please input the price of the item you ordered.");
            doubleArray[x] = Double.parseDouble(stringArray[x]);
        }
 

This way, I could still use the array information in my calculations that I used later on in the code. But now I have to find out just what this scanner thing is. Do you have any links of where I could find out more about it? Thanks in advance!

[anurag275125]

Scanner class allows you to take input from the keyboard.
You can get a little bit information about Scanner class by just typing java.util.Scanner at the command prompt.

for further information visit http://java.sun.com/javase/7/docs/ap...l/Scanner.html

[Misaio]

Thanks so much, Anurag! This really helped me out. And it's something I hadn't read in my Java books yet.

[Fletcher]

thank you for your codes..
i highly appreciate it...
thank you and God bless,,,

[Solutions]

This code should help.

Scanner input = new Scanner(System.in);
                //Read user  input.
                System.out.println("How many numbers do you want to enter?");
                int num = input.nextInt();
                int array[] = new int[num];
                System.out.println("Enter the " + num + " numbers now.");
                for (int i = 0 ; i < array.length; i++ ) 
                    {
                        array[i] = input.nextInt();
                    }

[frenzed]

your programme works but doesn't show the array that has been created. as system.out.println(""); suppose to show it.


@anurag275125

[Nepomuk]

Lines 11-13 of anurags code will print the contents of the array. Alternatively, one could use the java.util.Arrays class like this:

System.out.println("Array elements are : ");
System.out.println(Arrays.toString(a));

This can be very useful for debugging.