Read txt file into arraylist

[nickerhardt]

Hey

I have a txt file that looks like this:
at:@
too:2

I am triyng to get those words into an arraylist but i cannot get it to work.
I am doing it through an arraylist. In the arraylist the words are supposed to be in this order:
at
@
too
2

and so on.

This is what I have so far:
Scanner slang=new Scanner(new File(slangdict));

slang.useDelimiter(":");
//Tæller til oprettelse af array

while(slang.hasNext()) {

System.out.println(slang.next());

counter++;

}

//System.out.println(counter);

String[] slanglist=new String[counter];



int count=0;

while(slang.hasNext())

{

slanglist[count]=slang.next();

count++;

}

for(int i=0;i<slanglist.length;i++) {

System.out.println(slanglist[i]); }

The problem is, that when I print my arraylist on the scrren it just prints null.

What have I done wrong?

[PhHein]

I'd say the second while loop is never executed.

[nickerhardt]

I cannot see why the second while loop shouldn't be executed?
By the way - when I say say the arraylist prints null to the screen, it does so numerous times, like this:

null
null
null
null

and so on.

Have you got any other solutions?

They will be highly appreciated?

[Tolls]

You loop through the Scanner using next() and hasNext()...when it exists that loop the Scanner has reached the end of the file, so what do you think the next call to hasNext() (in the second loop) will return?

[nickerhardt]

All right, I guess it will return "false" and the while loop wont't be executed. But how do I "restart" the scanner/hasNext\next" so it will read from the start of the file?
I guess thats the way to start the second while loop.

[Tolls]

Why not simply store everything in the first loop?
Using an ArrayList rather than a straight array?
In fact, if this is supposed to be mapping the left hand side to the right then you're probably looking at a Map.

Unless this is an exercise, of course.

[nickerhardt]

Actually, I am supposed to put it into a hashmap, but i can't use the bufferedreader. So the only thing I could think of was to put it into an array first and the later on store it in a hashmap.

[PhHein]

Don't use a delimiter on the scanner, read a line, split it and add it to a map. Done.

I have no idea what a Reader is needed for.

[nickerhardt]

Got it now - Thanks for the help guys!

[PhHein]

Glad you got it sorted. Mark the thread as Solved, please.