Problem with Nextchar() and scanner...

Frisbee

Hey, first Datastructure lecture back today and Im already haveing trouble with some seriously easy stuff. ominous...

Question is:

1)Write a program, called Validate.java that validates user input to ensure that the user enters a lowercase character in the range ‘a’ to ‘z’ inclusive.


Heres my code so far:

import java.util.Scanner;


public class Validate2 {

/**
* @param args
*/
public static void main(String[] args) {


Scanner scanner = new Scanner(System.in);
char inputValue;
do {
System.out.println( "Enter a Letter in lower case:" );
inputValue = scanner.nextChar(); ERROR1


} while (inputValue >=z); ERROR2
System.out.println( "Input Valid!");

}

}

Basically im having trouble with the 'char' part of the Question.

at ERROR1 the error is:
Type mismatch: cannot convert from String to char

But how am I supposed to use the char if it wont convert. This part really has me fazed...

at ERROR2 its saying that 'z cannot be resolved'


Im not to worried about the lower case part for now, just trying to get it recognising letters betwwen a and z...

Draupnir

Im pretty sure scanner.NextChar() will only advance the cursor rather than read the actual char.

i think you need something like:

char z;
do{
z = scanner.ReadNext(); //or equivalent method i dont know off the top of my head
}while(scanner.NextChar())

kayos

Ahh college is back time for all the home work posts.

Frisbee

kayos wrote: »

Ahh college is back time for all the home work posts.

Is one of the functions of this forum not to help people who have a question about programming?

Of course there'll be more questions when the colleges go back as there will be more people stuck...

kayos

Yup its here to help people but to be honest home work questions can be a bit of a pain.

Just to let you know why you are getting the second error you don’t have a variable declared called z.... There is a world of difference between <= z and <= ‘z’

See it is those basic mistakes that say, to me any way, that you did not even try figure it out for yourself.

Frisbee

kayos wrote: »

Yup its here to help people but to be honest home work questions can be a bit of a pain.

Why only homework questions as opposed to any questions?

kayos wrote: »

Just to let you know why you are getting the second error you don’t have a variable declared called z.... There is a world of difference between <= z and <= ‘z’

Cheers

kayos wrote: »

See it is those basic mistakes that say, to me any way, that you did not even try figure it out for yourself.

I tried to figure it out, I'm still trying to figure it out as I still cant get it to work, I'm just not good at programming.

I have another part that im stuck on at the moment where I seem to be getting an error message for some reason I cant see on an 'else' statement. But haven't posted that up because I haven't exhausted every option I can think of to try and solve it...

Evil Phil

First of all kayos if you have a problem with somebody's post then use the Report Post button.

Second of all Frisbee is within the forum rules so he is welcome to post his question here. Everybody has to start somewhere.

If you complain in this thread again I'll ban you from the forum.