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help with an array

post #1 of 9
Thread Starter 
I am trying to read in a text file to an array. The text file contains the 50 states with their capitals so I know exactly how many values are going to be going into the array. filename is States.txt

Code:
        String[] States = new String[50];
        BufferedReader br = null;
        br = new BufferedReader( new FileReader( States.txt ) );
where is my code wrong?
post #2 of 9
Missing import java.io.*;

What is the format of the text file? Is it state and capital line by line? What's the deliminator?
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post #3 of 9
you should also wrap that code in a try-catch block in case anything exceptions are thrown.

also, using a scanner is way easier imo. then you dont have to use deliminators since scanner will return the next token.
Code:
File file = new File("data.txt");

try {
Scanner scanner = new Scanner(file);
  while (scanner.hasNext()) {
     String line = scanner.next();
     // save token here
}
catch (FileNotFoundException e) {
   e.printStackTrace();
}
source.
Edited by travesty - 8/1/11 at 2:03pm
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post #4 of 9
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
Missing import java.io.*;

What is the format of the text file? Is it state and capital line by line? What's the deliminator?
Washington Olympia WA 5689263West 6
Oregon Salem OR 3281974West 6
Massachusetts Boston MA 6147132New_England 1
Connecticut Hartford CT 3274069New_England 1

This is what the files looks like all the way down, 50 lines.
post #5 of 9
Quote:
Originally Posted by unfbilly11 View Post
Washington Olympia WA 5689263 West 6
Oregon Salem OR 3281974 West 6
Massachusetts Boston MA 6147132 New_England 1
Connecticut Hartford CT 3274069 New_England 1

This is what the files looks like all the way down, 50 lines.

Loop line-by-line.... Read each line until there are no more lines.


You might want to consider breaking the data apart during the read.... and complain to the data provider that text files really should be deliminated.
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post #6 of 9
Thread Starter 
I'm using netbeans. I think that it understands exactly what I want to do (I added the java.io.*) now the only error it says I'm having is underlining the .txt and saying it can't find the file.... is there a certain place I have to save it?
post #7 of 9
Quote:
Originally Posted by unfbilly11 View Post
now the only error it says I'm having is underlining the .txt and saying it can't find the file.... is there a certain place I have to save it?
it must be in the same directory as the java file.
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post #8 of 9
Quote:
Originally Posted by unfbilly11 View Post
I'm using netbeans. I think that it understands exactly what I want to do (I added the java.io.*) now the only error it says I'm having is underlining the .txt and saying it can't find the file.... is there a certain place I have to save it?

...don't depend on an IDE to guess what you are trying to do... that's just bad programming.

You have not specified the location of the file so the program is checking the default directory. Either provide the full path or move the file to the default directory.
Edited by DuckieHo - 8/1/11 at 2:09pm
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post #9 of 9
Thread Starter 
thanks guys. +rep
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