hasNext, Ctrl-Z not working

I am using Windows 7, netbeans 7.0.1 and the latest Java package
I am writing a simple while loop with hasNext() method as its condition, and supposedly the end-of-input indicator for Windows is Ctrl+Z, but that does not work for me. I also tried Ctrl-d, which supposedly works for Macs, unix, etc, but that also does not work.

Does anyone here know the proper end-of-input indicator?

Post your code, and I may be able to help. I know that ctrl+z is the "Stop" indicator in Terminal/Command Prompt.

import java.util.Scanner;
public class HasNext {
public static void main(String[] args) {
int i=0;
double grade;
Scanner input = new Scanner(System.in);

while(input.hasNext()) {
System.out.print("input: ");
grade = input.nextDouble();
i++;
}
System.out.print("i = "+i);

}
}


...it never prints the last system.out statement because it never breaks the loop, and Ctrl-Z is supposed to break it.. ive tried in netbeans, eclipse, and command prompt

Ah, I see, you should try limiting the amount of inputs you can have to say maybe 10, with a for loop, otherwise it probably will never stop.

well, the point of this program is that I don't know ahead of time how many things I want to input. the hasNext() method is supposed to return false and hence break the loop once Ctrl-Z is typed on windows system, and ctrl-d for macs, unix, etc...but neither of those are working on my windows 7

Try using..

Code:

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while(input >= 0 && input <= 100)

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inside the while loop already there.

what on earth is that? on what level of programming are you?

could someone else please help me???

Judging by your programming, you are using a grade score system, so you only need 0 - 100. So in order to finish the program, just go outside the boundaries.

no I am actually trying to average an arbitrary amount of numbers, not just between 0 and 100..the name "grade" was just random...specifically, I want to see how hasNext() works

if you want to see how hasNext() works, read the API.

You could maybe prompt them for the number of grades they want to enter first, then loop that many times?

thats the first place i looked.
unfortunately, they do not say what the end of input indicator is for each operating system

Bestsanchez, the name "grades" was random, I actually just want to input an arbitrary amount of numbers, so I don't want to use counter controlled repetition, because I don't know how many number I am inputing before I start looping

Quote:

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ive tried in netbeans, eclipse, and command prompt

---

The code in #3 works fine for me.

Note that Windows command processor may interpret Ctrl+Z as end-of-file, but there's no guarantee that other software will. When you use an IDE then System.in/System.out are commonly not the ordinary console streams, but are redirected to a little window where you see output and can enter input. The IDE may interpret Ctrl+Z as end-of-file, or it may not. Running your code reveals that Eclipse Helios (SR 2) does, and Netbeans 7.0 does not.

In not work in netbean, it work only in cmd.

If works fine in Eclipse and in an ordinary terminal as well; I don't know Netbeans though ... (type ^Z followed by <enter>)

kind regards,

Jos