Does anyone know why I am getting the error?

Hello,

so I am creating the following code to create a new file. Does anyone know why it's throwing the exception?

Code:

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import java.util.Scanner;
import java.lang.Integer;
import java.io.*;
import java.lang.*;
import java.io.File;

class CreateNumberFile{
        public static void main(String args[]){
        //Ask user for filename and highest number
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the filename");
        String fileName = in.next();
        System.out.println("Enter the highest number for this file");
        int maxNumber = in.nextInt();
       
        System.out.print("A file titled " + fileName+ " will be created containing a");
        System.out.println(" string of numbers with numbers ranging from 0 to: " + maxNumber);

               
        // Create a File object
        File myFile = new File("home/Users/Joe/Dropbox/Programming/Java/Projects/g2.txt");
        // Tests whether the file or directory denoted by this abstract
        //pathname exists.
        if (myFile.exists()) {
            System.out.println(myFile.getAbsolutePath() +
                    " File already exists");

        } else {
                  try{
            //creates a new, empty file named by this pathname
            myFile.createNewFile();
            System.out.println(myFile.getAbsolutePath() +
                    " File Created Successfully");
        }
                  catch(IOException e){
                          System.err.println ("Caught IOException "+e.getMessage());
  }
  }

        }//main
        }//class

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When I run it, I get the following error:

Code:

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Caught IOException The system cannot find the path specified

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I thought the code would check if the file exists and if it doesn't, I would use the constructor to create the file? any ideas?

Assuming you are using linux/ubuntu/mac.......
the path should start with "/"...
i.e., /home/users/.....

and next time you ask a question...make sure entire code is there....
i see some lines with missing ends.
hope its useful :)

Quote:

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Originally Posted by rougeking

Assuming you are using linux/ubuntu/mac.......
the path should start with "/"...
i.e., /home/users/.....

and next time you ask a question...make sure entire code is there....
i see some lines with missing ends.
hope its useful :)

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Wrong, and wrong. An absolute path would start with a / and a relative path wouldn't.

And could you point out which lines you consider to have 'missing ends'?

db

Quote:

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Originally Posted by bigsonny

I thought the code would check if the file exists and if it doesn't, I would use the constructor to create the file?

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What constructor?

Note that createNewFile() does not create directories, it can only create a File in an already existing directory.

db

Quote:

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Originally Posted by DarrylBurke

What constructor?

Note that createNewFile() does not create directories, it can only create a File in an already existing directory.

db

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Thanks DB.

What I calling a constructor is this line

File myFile = new File("home/Users/Joe/Dropbox/Programming/Java/Projects/g2.txt");

Also, there is no missing end. This is my entire code. Every line is terminated with a ";".

DB, the directory does exist, that's where the Java file is.

So I went back and modified the code by adding a "//" to the beginning of the path and now it compiles but when I look in that directory and folder (Windows 7 by the way), I still don't see a file.

Code:

---

import java.util.Scanner;
import java.lang.Integer;
import java.io.*;
import java.lang.*;
import java.io.File;

class CreateNumberFile{
        public static void main(String args[]){
        //Ask user for filename and highest number
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the filename");
        String fileName = in.next();
        System.out.println("Enter the highest number for this file");
        int maxNumber = in.nextInt();
       
        System.out.print("A file titled " + fileName+ " will be created containing a");
        System.out.println(" string of numbers with numbers ranging from 0 to: " + maxNumber);

               
        // Create a File object
        File myFile = new File("//home/Users/Joe/Dropbox/Programming/Java/Projects/g2.txt");
        // Tests whether the file or directory denoted by this abstract
        //pathname exists.
        if (myFile.exists()) {
            System.out.println(myFile.getAbsolutePath() +
                    " File already exists");

        } else {
                  try{
            //creates a new, empty file named by this pathname
            myFile.createNewFile();
            System.out.println(myFile.getAbsolutePath() +
                    " File Created Successfully");
        }
                  catch(IOException e){
                          System.err.println ("Caught IOException "+e.getMessage());
  }
  }

        }//main
        }//class

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Case solved. It turns out that I was missing Users.

So the path should be ("/Users/Joe/Dropbox/Programming/Java/Projects/g2.txt")

It compiled and created the file correctly.

Thanks to everyone for the feedback and for allowing me to work through this little hurdle with you.

Quote:

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Originally Posted by bigsonny

So the path should be ("/Users/Joe/Dropbox/Programming/Java/Projects/g2.txt")

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So what happens when the code is run on another computer, one that doesn't have that directory structure in place?

Look into using a System property instead: System Properties (The Java™ Tutorials > Essential Classes > The Platform Environment)

db

Quote:

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Originally Posted by DarrylBurke

So what happens when the code is run on another computer, one that doesn't have that directory structure in place?

Look into using a System property instead: System Properties (The Java™ Tutorials > Essential Classes > The Platform Environment)

db

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Thanks DB, I'll try it.