ArrayList

[beeto]

I was wondering if it was possible to do a loop which continuously adds the integers that the user specifies into the array list and only stops asking the user for inputs once they input something other than an integer.

Here's what I have so far of the method, I just can't think of a way to do what I've mentioned above.

public static void do_enter()
{
	Scanner scan = new Scanner(System.in);
	
	ArrayList numbers = new ArrayList();
	
	System.out.print("Enter a number: ");
	numbers.add(scan.nextInt());
	
	System.out.println(numbers);
}

Example would be like:

Enter a number: 1
[1]
Enter a number: 2
[1, 2]
Enter a number: -1
[1, 2 , -1]
Enter a number: abc
(program should end)

[BigDaddyLH]

To detect an input of a non-int, you could either test for it with Scanner's hasNextInt or catch a NoSuchElementEx ception. Study the API: http://java.sun.com/javase/6/docs/ap...l/Scanner.html

[sukatoa]

I was wondering if it was possible to do a loop which continuously adds the integers that the user specifies into the array list and only stops asking the user for inputs once they input something other than an integer.

Here's what I have so far of the method, I just can't think of a way to do what I've mentioned above.

public static void do_enter()
{
	Scanner scan = new Scanner(System.in);
	
	ArrayList numbers = new ArrayList();
	
	System.out.print("Enter a number: ");
	numbers.add(scan.nextInt());

	
	System.out.println(numbers);
}

Example would be like:

Enter a number: 1
[1]
Enter a number: 2
[1, 2]
Enter a number: -1
[1, 2 , -1]
Enter a number: abc
(program should end)

You can put try/catch in [PHP]numbers.add(sca n.nextInt());[/PHP]

I think it is NumberFormatExc eption to use if the input cannot convert into integer value
When exception occur, then terminate the program...

Correct me if im wrong,
Sukatoa (Shadow shaman)

[beeto]

Thanks guys, I'll try it out.