RE: Java Delemma
- From: "Sina Bahram" <sbahram@xxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Mon, 28 Jun 2010 15:38:26 -0400
I couldn't remember whether it was nextline or getNext, but getNext sounds way
more correct than my version.
Take care,
Sina
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex Hall
Sent: Monday, June 28, 2010 3:36 PM
To: programmingblind@xxxxxxxxxxxxx
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)
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