Re: Java Delemma
- From: Alex Hall <mehgcap@xxxxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Mon, 28 Jun 2010 22:30:00 -0400
And the problem is that the final paragraph does not get the indent...
What if you changed the if statement to something like this:
if (inputString.length() < 1)
{
outFile.println("\n");
inputString = blanks+inputString;
}
I say this because, and I could be wrong here, each call to a file
object's nextLine() method moves you down a line in the file, as
though you had pressed the down arrow (assuming the arrows moved you
by full lines, not just as many words as are on one line of a
monitor). When you assign inputString to inFile.nextLine(), you press
this hypothetical down arrow. Then, when you assign inputString to
blanks+inFile.nextLine(), you are pressing the arrow again, so the
line may not be correct. I am not sure if that will do it, but it is
the only thing I see. Someone on the list will likely be able to
direct you better.
On 6/28/10, Gilbert Neiva <gneiva@xxxxxxx> wrote:
> Here is the entire class.
>
> import java.io.*; // importing input.output classes
> import java.util.Scanner;
>
> public class History
> {
> static Scanner inFile; // Object that will read from file
> static PrintWriter outFile; // object that will print to file
>
> static void printHistory() throws IOException
> // Start of void method
> {
> String inputString; // String for line of text in file
> final String blanks = " ";
> // Five blanks inserted at beginning of paragraphs
> inFile = new Scanner(new FileReader("history.d1"));
> // Instantiating new scanner and new filereader object with
> // history.d1 as argument
> outFile = new PrintWriter(new FileWriter("history.d2"));
> // Instantiating new printWriter object
> // It will be used to write to a file
> inputString = blanks+inFile.nextLine();
> outFile.println(inputString);
> // Printing 5 spaces plus line
> // to file
>
> while (inFile.hasNextLine())
> {
> inputString = inFile.nextLine();
>
> if (inputString.length() < 1)
> {
> outFile.println("\n");
> inputString = blanks+inFile.nextLine();
> }
> outFile.println(inputString);
> // Printing line of text to file
> }
> inFile.close();
> outFile.close();
> // Closing files
> }
>
> public static void main(String[] args) throws IOException
> {
> printHistory();
> // Calling method printHistory()
> }
> } // End of class
>
> Gilbert Neiva
>
> ----- Original Message -----
> From: "Alex Hall" <mehgcap@xxxxxxxxx>
> To: <programmingblind@xxxxxxxxxxxxx>
> Sent: Monday, June 28, 2010 6:58 PM
> Subject: Re: Java Delemma
>
>
>>I don't follow. Could you post the entire loop so we can see what is
>> going on? Also, comments are welcomed! Remember that in Java, two
>> slashes mean that the rest of the line is a comment, so you could put
>> this in your file:
>> if(1a==0){ //check that a is really 0
>> System.out.print("var a is 0!"); //tell user
>> }//end if
>>
>> On 6/28/10, Gilbert Neiva <gneiva@xxxxxxx> wrote:
>>> I succeeded in making my application that inputs a file, prints 5 spaces
>>> at
>>> the beginning of a paragraph and prints to a file with the new changes.
>>> Now
>>> I have another problem. The last paragraph of the input file has two
>>> blank
>>> lines above it. When my application runs and creates the output file, the
>>> last paragraph of the output file has two lines above it, but the
>>> paragraph
>>> is not indented. The blank line just above the paragraph has 5 space
>>> characters in it. The rest of the output file is fine. The paragraphs in
>>> the
>>> output file that have no indent issues have one blank line above them
>>> which
>>> is what I want. I made an if statement inside a while statement to detect
>>> the blank lines and print an extra blank line to the output file as well
>>> as
>>> store the new paragraph indented 5 spaces in a string varriable. The if
>>> statement is as follows.
>>>
>>> if inputString.length() < 1
>>> {
>>> outFile.println("\n");
>>> inputString = inFile.nextLine();
>>> }
>>>
>>> What do I do to correct my last paragraph so it is indented properly, but
>>>
>>> I
>>> still have two blank lines above it?
>>>
>>> Gilbert Neiva
>>>
>>> ----- Original Message -----
>>> From: "Alex Hall" <mehgcap@xxxxxxxxx>
>>> To: <programmingblind@xxxxxxxxxxxxx>
>>> Sent: Monday, June 28, 2010 1:36 PM
>>> Subject: Re: Java Delemma
>>>
>>>
>>>> You want to use getNext(), not hasNext(). HasNext is a test to see if
>>>> any lines remain; you might say something like
>>>> while(file.hasNextLine()){
>>>> txt+=file.getNextLine();
>>>> }
>>>> Please note that it has been some time since I did Java, so the method
>>>> may not be called getNext, but it is something similar which you can
>>>> find in the docs.
>>>> The error is because hasNext returns true or false (a boolean) where
>>>> getNext returns an actual string, which is what you want.
>>>>
>>>>
>>>> On 6/28/10, Gilbert Neiva <gneiva@xxxxxxx> wrote:
>>>>> I'm trying to write an application which takes an input file, and adds
>>>>> 5
>>>>> blank spaces at the beginning of each paragraph. Then the application
>>>>> is
>>>>> to
>>>>> write to an output file with the new changes. The application will
>>>>> detect
>>>>> the beginning of a new paragraph because there is a blank line before
>>>>> it.
>>>>>
>>>>> I
>>>>> test for the blank using the following if statement.
>>>>>
>>>>> if inputString.length() < 1
>>>>> {
>>>>> inputString = blanks+inFile.hasNextLine();
>>>>> }
>>>>>
>>>>> When I tried to compile the application using the javac program, I get
>>>>> the
>>>>> following error.
>>>>>
>>>>> History.java:23: incompatible types
>>>>> found : boolean
>>>>> required: java.lang.String
>>>>> inputString = inFile.hasNextLine();
>>>>> ^
>>>>> 1 error
>>>>>
>>>>> The source code for the application is below.
>>>>>
>>>>> import java.io.*; // importing input.output classes
>>>>>
>>>>> import java.util.Scanner;
>>>>>
>>>>>
>>>>> public class History
>>>>>
>>>>> {
>>>>>
>>>>> public static Scanner inFile;
>>>>>
>>>>> public static PrintWriter outFile;
>>>>>
>>>>>
>>>>> public static void main(String[] args)
>>>>>
>>>>> {
>>>>>
>>>>> String inputString; // Input string from a line in file
>>>>>
>>>>> final String blanks = " ";
>>>>>
>>>>> // Five blanks inserted at beginning of each paragraph
>>>>>
>>>>> inFile = new Scanner(new FileReader("history.d1"));
>>>>>
>>>>> // Instantiating new scanner and new filereader object with
>>>>>
>>>>> // history.d1 as argument
>>>>>
>>>>> outFile = new PrintWriter(new FileWriter("history.d2"));
>>>>>
>>>>> // Instantiating new printWriter object
>>>>>
>>>>> // It will be used to write to a file
>>>>>
>>>>> inputString = blanks+inFile.hasNextLine();
>>>>>
>>>>> outFile.println(inputString);
>>>>>
>>>>>
>>>>> while (inFile.hasNextLine())
>>>>>
>>>>> {
>>>>>
>>>>> inputString = inFile.hasNextLine();
>>>>>
>>>>>
>>>>> if (inputString.length() < 1)
>>>>>
>>>>> {
>>>>>
>>>>> inputString = blanks+inFile.hasNextLine();
>>>>>
>>>>> }
>>>>>
>>>>> outFile.println(inputString);
>>>>>
>>>>> }
>>>>>
>>>>> inFile.close();
>>>>>
>>>>> outFile.close();
>>>>>
>>>>> }
>>>>>
>>>>> }
>>>>>
>>>>>
>>>>>
>>>>> What am I doing wrong?
>>>>>
>>>>>
>>>>>
>>>>> Gilbert Neiva
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Have a great day,
>>>> Alex (msg sent from GMail website)
>>>> mehgcap@xxxxxxxxx; http://www.facebook.com/mehgcap
>>>> __________
>>>> View the list's information and change your settings at
>>>> //www.freelists.org/list/programmingblind
>>>>
>>>
>>> __________
>>> View the list's information and change your settings at
>>> //www.freelists.org/list/programmingblind
>>>
>>>
>>
>>
>> --
>> Have a great day,
>> Alex (msg sent from GMail website)
>> mehgcap@xxxxxxxxx; http://www.facebook.com/mehgcap
>> __________
>> View the list's information and change your settings at
>> //www.freelists.org/list/programmingblind
>>
>>
>
> __________
> View the list's information and change your settings at
> //www.freelists.org/list/programmingblind
>
>
--
Have a great day,
Alex (msg sent from GMail website)
mehgcap@xxxxxxxxx; http://www.facebook.com/mehgcap
__________
View the list's information and change your settings at
//www.freelists.org/list/programmingblind
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