Not working when file is imported

[System_Error]

Ok. In my the text editor I have been working on, I have methods that select or find parts of text. This works fine, but when you open a file, it doesn't.

Here is the code to open a file:

public void processOpen()
{
/* process Opening a new file
*/
returnVal = chooser.showOpenDialog(this);
getFile = chooser.getSelectedFile().getPath();
try {
textArea2.read(new FileReader(getFile),null);
}
catch(IOException e)
{
e.printStackTrace();
}


}

Here is the code for finding text:

public void processFind()
{
/* When the find method is invoked show an input dialg
* process the string inputed and highlight the text
*/
String searchString = JOptionPane.showInputDialog("Enter the string to search for");
if (getFile == null)
{
String val = textArea2.getText();
int left = val.indexOf(searchString);
int right = left + searchString.length();
/* Use the setSelectionStar() and setSelectionEnd()
* methods to highlight the text
*/
textArea2.setSelectionStart(left);
textArea2.setSelectionEnd(right);
}
else if (getFile != null)
{
}
else
{
}
}


And here is the code to select all:

public void processSelectAll()
{
/* When Select all is clicked by the user
* process the starting and ending of the
* text area and select all of it
*/
String val = textArea2.getText();
int left = val.indexOf(val);
int right = left + val.length();
/* select it
*/
textArea2.setSelectionStart(left);
textArea2.setSelectionEnd(right);

}



I don't know why there would be conflict when I set the contents of the file to the text area.
Can anyone help me with this?

[Dillinger4]

I am assuming that textArea2 in this line(textArea2.read(new FileReader(getFile),null)) is a JTextArea. I never heard of a read() method being contained in that class. :confused: And if there is then it looks like you are just setting the text of the JTextArea to the whole file.

[System_Error]

Is there a different way of doing it, so that everything agrees?

[Dillinger4]

Perhaps you could get the String that you want to match from the processFind() method then do somthing like the following.
import java.util.*;
import java.util.regex.*;

Scanner s = new Scanner(wholefilestring);
Pattern p = Pattern.compile(selectedstring);
String result = s.findInLine(p);
jta.append(result);


A Scanner's constructor takes many arguements one being a File.
http://java.sun.com/j2se/1.5.0/docs/api/

[System_Error]

I tryed that, but I'm getting an error:
Exception in thread "AWT-EventQueue-0" java.util.regex.PatternSyntaxException: Illegal/unsupported escape sequence near index 26....Then it list the path of the file and points to one of the "\" charaters seperating the path.


public void processFind()
{

String searchString = JOptionPane.showInputDialog("Enter the string to search for");
if (getFile == null)
{
String val = textArea2.getText();
int left = val.indexOf(searchString);
int right = left + searchString.length();

textArea2.setSelectionStart(left);
textArea2.setSelectionEnd(right);
}
else if (getFile != null)
{
Scanner s = new Scanner(getFile);
Pattern p = Pattern.compile(getFile);
String result = s.findInLine(p);
textArea2.append(result);
}
else
{
}
}

[System_Error]

Hold on I made a mistake...The Pattern is suppose to be the search string...

[System_Error]

Now that I got it fixed. It compiles and runs fine, but how would I get it to highlight?

[System_Error]

I tried this and got a null pointer exception...


else if (getFile != null)
{
String val = textArea2.getText();
Scanner s = new Scanner(getFile);
Pattern p = Pattern.compile(searchString);
String result = s.findInLine(p);
int left = val.indexOf(result);
int right = left + searchString.length();
textArea2.setSelectionStart(left);
textArea2.setSelectionEnd(right);
}

[Dillinger4]

What is the line where the exception is being thrown?

[System_Error]

It does'nt really say at which line it's being thrown...It gives me this:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

(then it gives a list of a bunch of stuff like:
at java.langlString.indexOf(Unkown Source)
there is a ton of them, so I won't be able to post them)

[Dillinger4]

Yeah that's one thing that used to drive me crazy. When an exception is thrown from awt dos goes nuts. The following worked for me using a .txt file with the contents "What is the line where the exception is being thrown?."

import java.io.*;
import java.util.*;
import java.util.regex.*;

public class Search{
public static void main(String[] args){
try{
Scanner s = new Scanner(new File("C:" + File.separator + "SearchTest.txt"));
Pattern p = Pattern.compile("the exception");
String match = s.findInLine(p);
System.out.println(match);
}catch(IOException io){System.err.println(io);}
}
}

[System_Error]

Ok..The code is fine, but now how could we highlight the text? Or is this even possible the way that I coded the importing of the file? I mean, I don't know how you could apply the any of the select methods to this..Do you think I will have to resort to finding a new way to import the file instead of reading it like I did?

[System_Error]

I just tried the code for the select all method and it works. So if that was able to highlight the text from a file then we should be able to figure out a way for the find() method to work.

[System_Error]

Dilenger, your going to kill me for this...The reason why it wasn't working is because the cursor wasn't in the text area, and when it is, it works...Sorry for all your trouble. But thanks for trying to help.

[Dillinger4]

That's why i didn't reply back. I figured it wasen't the code. :lol:

[System_Error]

Well that was nice to know :mad: