java.util.Scanner runs in Vista but not in Linux

[pellebye]

Hi all

Following code runs in eclipse on Vista but not in eclipse on Linux:

// Catch the players.
File file = new File("players.txt");
try {        	
    // Create a new Scanner object
    Scanner scanner = new Scanner(file);
    int i = 0;
    // Check if there are more lines
    while (scanner.hasNextLine()) {
    	// Read one player
        parNames[i] = scanner.nextLine();
        i += 1;
    }
} catch (FileNotFoundException e) {
    e.printStackTrace();
}

The file "players.txt" exist and this code gives no exceptions. If bad permissions I would expect an exception. The files permissions are "-rwxrwxrwx 1 root root 420 ... players.txt". parNames are filled with "null".

Do anybody know what I can do?

[mrmatt1111]

Are you sure you are actually finding the file "players.txt"? It seems it would look for it in the home directory of your current user in linux.

Try this:

File file = new File("players.txt");
System.out.println(file.exists());

You can see where it is actually looking with this:

File file = new File(".");
System.out.println(file.getAbsolutePath());

And if you have the file in the same directory as the compiled class,
Then try this:

File file = new File(this.getClass().getResource("players.txt").getFile());
System.out.println(file.exists());

[Eranga]

Paths can make lots of trouble in Linux and Windows. Better to check all the file path as mrmatt1111 explain in the above code. Always hang with absolute path.

[pellebye]

Thank you for your answers. I have modified the code to contain the tests for file exists:

// Catch the players.
File file = new File("players.txt");
System.out.println("===========================");
System.out.println(file.exists());
System.out.println(file.getAbsolutePath());

File file2 = new File(this.getClass().getResource("players.txt").getFile());
System.out.println(file2.exists());
System.out.println("===========================");
try {            
    // Create a new Scanner object
    Scanner scanner = new Scanner(file);
    int i = 0;
    // Check if there are more lines
    System.out.println(scanner.hasNextLine());
    while (scanner.hasNextLine()) {
        // Read one player
        parNames[i] = scanner.nextLine();
        System.out.println(parNames[i]);                
        i += 1;
    }
} catch (FileNotFoundException e) {
    e.printStackTrace();
}
System.out.println("===========================");

The output is

===========================
true
/mnt/home/usr/workspace/BC_5/players.txt
true
===========================
false
===========================

The last "false" is for scanner.hasNextLine so I have to correct my first statement that "parNames are filled with "null"" ... parNames are not touched. "players.txt" has 30 lines ... so why?

[mrmatt1111]

It seems to work for me (i'm running linux).

I would suggest recreating the "players.txt" from scratch on your linux machine (don't copy and paste) because there may be bad formatting in the file. That is the only thing i can think of.

[pellebye]

Yes, the problem was in the text file. I use some danish letters in the lines of players.txt and that is unwelcome on the linux side.

It is importent for me to be able to copy in Vista and paste in Linux. My Aspire One keyboard is english so I have to do some convertion programming.

Thank you for all help.

[Eranga]

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