Java Question. (acting up)

Hobbes

this code...

if (inputfile.exists())
i == 1;
else
i == 2;


Now if the filename is "s.txt" and the file isn't there then i = 2 but if the filename is "s" and the file isn't there then i = 1.

Anyone know why?

Slaanesh

Me being a newbie and all, but instead of i == 1 and i == 2 should it not be i = 1 and i = 2

Slaan

[This message has been edited by Slaanesh (edited 23-05-2001).]

ecksor

What class is inputfile an instance of?

Evil Phil

Are you assigning a value to i before you call this, cos I can't understand why the double equals '==' is assigning a value to it. Perhaps we could see the code for the exists() method as well?

Hobbes

<font face="Verdana, Arial" size="2">Originally posted by Slaanesh:
Me being a newbie and all, but instead of i == 1 and i == 2 should it not be i = 1 and i = 2

Slaan

[This message has been edited by Slaanesh (edited 23-05-2001).]</font>

yea. whatever it was late. That was just to point out what part was being executed.

Hobbes

let me write it better.

(snip)
   int i = 0;

// both files "s" + "s.txt" don't exist.
// Doesn't work    [b]String to_name = "s";[/b]
    String to_name = "s.txt"; //works

    File to_file = new File(to_name);
    if (to_file.exists())
        i = 1;  
    else
        i = 2;
(snip)

DeadBankClerk

just a thought, but maybe try and pud some luvely curly braces aroud the if/else?

i know an if clause doesnt need {} for one statement, but does it need braces if it is part of if/else?

(try/catch need curly braces for just one line of code?)

if ( to_file.exists() == true  )
{
    i = 1;
}
else
{
    i = 2;
}

i dont expect this to fix your problem, its the best i can think of.

---

- Dead Bank Clerk -
You must defeat my dragon
punch to stand a chance.

[This message has been edited by DeadBankClerk (edited 23-05-2001).]

Hobbes

time out...

There is nothing wrong with the if statement.

The problem is with exists(). It doesn't seem to behave and I was just wondering why.

DeadBankClerk

another idea:

why is the int i an int?

// Declare a boolean flag 
// for the file existing
boolean fileExists = false;


if ( to_file.exists() == true  ){
    fileExists = true;
}
else
{
    fileExists = false;
}

Hobbes

read my previous post. *sigh*

Look if the code was...

boolean fileExists = false;

fileExists = to_file.exists();


IT STILL WONT WORK PROPERLY. (btw, Bools are auto set to false anyway).

[This message has been edited by Hobbes (edited 23-05-2001).]

Evil Phil

I used this and it worked for me, what package are you using with this?

import java.io.*;
public class hobbes
{
	public static void main(String[] args) 
	{
		int i = 0;
		// both files "s" + "s.txt" don't exist.
		// Doesn't work    String to_name = "s";    
		String to_name = "C:\\s"; //works    
		File to_file = new File(to_name);    
		if (to_file.exists())       
			i = 1;      
		else        
			i = 2;
		System.out.println(i);
	}
}

I'll add that it worked fine with

String to_name = "s"; 

[This message has been edited by Evil Phil (edited 23-05-2001).]

Hobbes

jdk1.3.0_02 using java.io.*

Yea that works on this machine. I'll test the code next time I'm in work. It's possible I have a contaminated jdk.

cheers.

Evil Phil

Maybe you should try the full path in work as well. Probably makes no odds but worth ruling out anyway.

Baz_

Always wondered about that one meself, hmmmmm..

Oh btw should it not be a single equals??

What might be happening is that if you have any files starting with s in the directory you're working from then perhaps its using them by accident.

//megoes off to check this

Baz_

just tried it in c and my explanation holds no water however java is a funny language, so I don't know...

Anyways if its not that I don't think that I can come up with another guess.

yossarin

you could also try a relative path to the dir you're running in. java's funny about that...
'./s.txt'

edit: just thought - is the class in a package ? 'cos then you'll have to provide a path from the root of the package.

[This message has been edited by yossarin (edited 24-05-2001).]