Need help debugging this file parsing program I am writing

[The_Sponzy_Paradox]

Well I wrote this code

import java.io.*;


public class verncommandshell
{
    public static void main(String [] args)throws IOException
    {
	int i = 0;
	BufferedReader br = new BufferedReader
	    (new InputStreamReader(System.in));
	File commandfile;
	try//reads in the command txt file and stores it in an array	    
	    {
	      commandfile = new File(commands.txt);
	      commandreader = new FileReader(commandfile);
       	      String[] commandbuffer = new Strimg[commandfile.length];
	      while(commandreader != -1)
	          {
		      commandbuffer[i] = commandreader.read();
		      i++;
	          }
	      commandreader.close();		       
              commandfile.close();
	    }

	 catch(IOException e)
	   {
	     e.printStackTrace();
	   }
	for(i = 0; i < commandbuffer.length; i++)
        {
	    System.out.print(commandbuffer[i]);
   
	}
   }
}

and this is the compiler output

Script started on Fri 02 Jul 2010 08:14:27 PM EDT
Welcome Commander system initilizing
Command line interface intilized java    javac verncommandshell.java
verncommandshell.java:23: cannot find symbol
symbol  : variable commands
location: class verncommandshell
	      commandfile = new File(commands.txt);
	                             ^
verncommandshell.java:24: cannot find symbol
symbol  : variable commandreader
location: class verncommandshell
	      commandreader = new FileReader(commandfile);
	      ^
verncommandshell.java:25: cannot find symbol
symbol  : class Strimg
location: class verncommandshell
       	      String[] commandbuffer = new Strimg[commandfile.length];
       	                                   ^
verncommandshell.java:25: cannot find symbol
symbol  : variable length
location: class java.io.File
       	      String[] commandbuffer = new Strimg[commandfile.length];
       	                                                     ^
verncommandshell.java:26: cannot find symbol
symbol  : variable commandreader
location: class verncommandshell
	      while(commandreader != -1)
	            ^
verncommandshell.java:28: cannot find symbol
symbol  : variable commandreader
location: class verncommandshell
		      commandbuffer[i] = commandreader.read();
		                         ^
verncommandshell.java:31: cannot find symbol
symbol  : variable commandreader
location: class verncommandshell
	      commandreader.close();		       
	      ^
verncommandshell.java:32: cannot find symbol
symbol  : method close()
location: class java.io.File
              commandfile.close();
                         ^
verncommandshell.java:39: cannot find symbol
symbol  : variable commandbuffer
location: class verncommandshell
	for(i = 0; i < commandbuffer.length; i++)
	               ^
verncommandshell.java:41: cannot find symbol
symbol  : variable commandbuffer
location: class verncommandshell
	    System.out.print(commandbuffer[i]);
	                     ^
10 errors
Command line interface intilized exit

Script done on Fri 02 Jul 2010 08:14:52 PM EDT

I am confused on what I am doing wrong so guys help?:o

[Eranga]

You've not initialize commands variable in your code before use. Is this the complete code you've written?

[The_Sponzy_Paradox]

I thought I can't initialize it that as it is the name of a .txt file that I am parsing and loading into an array. Can you show me an example of or a link to some better source than the lecture notes I am using then? Thanks a lot guys

[Norm]

new File(commands.txt);

Is it supposed to be a String?
new File("commands.txt");

[The_Sponzy_Paradox]

No at least I don't think so, here is what I was working off of:

package Files13;


import java.io.*;
public class Ex132b 


{
	/**
	 Kyle Sponable
	 Ex 13-2b
	 This program will output to a file using characted streams
	 
	 */
	
	public static void main(String[] args)throws IOException
	{
		InputStream is;
		OutputStream os;
		int value;
		String fout, fin;
			
		BufferedReader br = new
		       BufferedReader(new InputStreamReader(System.in));
		File f, ff;
		System.out.print("Enter input filename: ");
		fin = br.readLine();
		System.out.print("Enter output filename: ");
		fout = br.readLine();
		try
		{
			ff = new File(fin);
			f = new File(fout);
			is = new FileInputStream(ff);
			os = new FileOutputStream(f);
			//System.out.println("Enter names numbers (<ctrl>z to end: ");
			value = is.read();
			while (value != -1)
			{
				os.write(value);
				value = is.read();
			}
			is.close();
			os.close();
			System.out.println("/n" + fout + " created ");
		}
		catch(IOException e)
		{
			e.printStackTrace();
			
		}
	}
}

[Norm]

I'm confused. You've posted two different programs.
Which one are you working on?

[The_Sponzy_Paradox]

The first one is the one I am working on, the second one is some source from some of my old notes that I took last semester in programming class and what I am basing the file parsing off of. I was not sure if seeing that might help you guys out

[Norm]

OK. How are the list of error coming?

[The_Sponzy_Paradox]

Here is the code as I have it now it has gotten some what better though I am still unsure what is wrong. Thanks guys Norm in particular

import java.io.*;


public class verncommandshell
{
    public static void main(String [] args)throws IOException
    {
	int i = 0;
	BufferedReader br = new BufferedReader
	    (new InputStreamReader(System.in));
	File 'commands.txt' ;
	try//reads in the command txt file and stores it in an array	    
	    {
	      commandfile = new File(commands.txt);
	      commandreader = new FileReader(commandfile);
       	      String[] commandbuffer = new Strimg[commandfile.length];
	      while(commandreader != -1)
	          {
		      commandbuffer[i] = commandreader.read();
		      i++;
	          }
	      commandreader.close();		       
              commandfile.close();
	    }

	 catch(IOException e)
	   {
	     e.printStackTrace();
	   }
	for(i = 0; i < commandbuffer.length; i++)
        {
	    System.out.print(commandbuffer[i]);
   
	}
   }
}

Here is the output:

Command line interface intilized javac verncommandshell.java
verncommandshell.java:20: unclosed character literal
	File 'commands.txt' ;
	     ^
verncommandshell.java:20: not a statement
	File 'commands.txt' ;
	^
verncommandshell.java:20: unclosed character literal
	File 'commands.txt' ;
	                  ^
verncommandshell.java:20: not a statement
	File 'commands.txt' ;
	              ^
4 errors

[Fubarable]

Where have you seen code like this as it's not Java?

File 'commands.txt' ;

To declare any variable you need a type name, such as File, followed by a variable name, but this can't be enclosed in single quotes. If you want to declare and initialize a variable, then you need the above and set it equal to something that returns a File object such as a constructor, for e.g.,

File myFile = new File("myDirectory/mySubdirectory/FileName.txt");

What are you trying to do here, create a new File that is associated with a File on the disk called "commands.txt"?

[The_Sponzy_Paradox]

Well I fixed everything but one last error. And I am not sure, I declared a String array but I cannot insert the tokens into the string array

here is the code

import java.io.*;


public class verncommandshell
{
    public static void main(String[] args)throws IOException
    {
	int i = 0;
	BufferedReader br = new BufferedReader
	    (new InputStreamReader(System.in));
	File commandfile = new File(commands.txt");//change later
	FileReader fr = new FileReader(commandfile);
	StreamTokenizer st = new StreamTokenizer(fr);
	String[] commandbuffer = new  String[(int)commandfile.length()];//length of the file
	
   try//reads in the command txt file and stores it in an array
	    {
		while(!st.TT_EOF)//while token is not the EOF
	          {
		      commandbuffer[i] = (st.nextToken()); //error
		      i++;
	          }
	    }

	 catch(IOException e)
	   {
	     e.printStackTrace();
	   }
	for(i = 0; i < commandbuffer.length; i++)//going to go away here for testing only
        {
	    System.out.print(commandbuffer[i] +  "\n" );

      	}
   }
}

error is:

verncommandshell.java:28: incompatible types
found   : int
required: java.lang.String
		      commandbuffer[i] = (st.nextToken());
		                                      ^

[Eranga]

What your error message really talking about? Did you read it? commandbuffer is a String array and you are trying to store an int value in it (nextToken())? Can you do that?

[The_Sponzy_Paradox]

Yeah, that is why I am confused it should just be a string and should accept a string no problem. I never created an Int array. So I do not understand why it is looking for an Integer. It is a string cause I can convert it to an integer and it will compile.

[Eranga]

Or else convert your int value to a string literal. Depends on your requirement.

[Norm]

why it is looking for an integer

Read the API doc for the nextToken() method! What type of data does it return? Is it at String or something else?