Hi,
The problem is that the ".toString()" method won't work as you expected.
The proper way to build a string with your acquired input is:
String fromCmdLine = new String(buffer).
That makes sure your typed in ints will be coming in correctly.
Best,
Jos
On Thu, Aug 27, 2009 at 5:21 AM, CJ<meiy...@163.com> wrote:
>
> I'm a college student. So this problem may be a little silly. Thanks
> to help me.
> Why it always throw the NumberFormatException?
> ---------------------------------------------------------------------------------------------------------------------
> ArrayList<Integer> inputNum = new ArrayList<Integer>();
>
> try {
> System.out.println(" Please input an integer：");
> while (true) {
> byte buffer[] = new byte[128];
> System.in.read(buffer);
> if ("end".equals(buffer.toString().trim())) {
> break;
> }
> else {
> inputNum.add(Integer.parseInt(buffer.toString().trim()));
> }
> }
> }
> catch (IOException e) {
> System.out.println(e.toString());
> }
> catch (NumberFormatException e) {
> System.out.println("Please input an integer.");
> }
> --------------------------------------------------------------------------------------------------------------------
> >
>
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