Any one can help me?? please

Question

I am neither strong in Java or programming!
Can understand how things work.
This is what I am trying to do:
Open a file in a directory
check if the file has xml extension.
then move the file to different directory.
The code worked if I provide the path for the FileReader. However, when I changed it to check if the given directory contains the specfic file, I got error message
Assuming there is only one xml file in a specified directory and the name of the file will be changed when it is stored in the new directory
My code:
import java.io.*;
import java.util.*;
import java.lang.String;
public class FileCopyTst1
     public static void main(String[] args) throws IOException
          File file = new File(XMLFileFilter("C:\\cluster"));
          BufferedReader fin = new BufferedReader(new FileReader(file));
          BufferedWriter fout = new BufferedWriter(new FileWriter("C:\\testCluster\\cluster1.xml"));
          String line;
          while ((line = fin.readLine()) != null)
               // Output our result to the output file
          fout.write(line);
          fout.newLine();
          // Close both files
          fin.close();
     fout.close();
     private class XMLFileFilter implements java.io.FileFilter
     public boolean accept(File f) {
     if (f.isDirectory()) return true;
     String name = f.getName().toLowerCase();
     return name.endsWith("xml");
     }//end accept
     }//end class HTMLFileFilter
}//end class
Got the following error message
C:\FileCopyTst1.java:9: cannot resolve symbol
symbol : method XMLFileFilter (java.lang.String)
location: class FileCopyTst1
          File file = new File(XMLFileFilter("C:\\cluster8"));
^
1 error
if anybody can help me thanks a lot.

Answer 1

Hi,
First of all you try to create object of XMLFileFilter without "new"
it's impossible and it is a reason of error you described.
Next problem: you can't create new instance of XMLFileFilter by calling
new XMLFileFilter("C:\\cluster") because you do not have such constructor.
Move XMLFileFilter outside of FileCopyTst1 because now it is inner class and it cant be instantiated without instance of outer class(FileCopyTst1)
If you want just move file you can use file.renameTo() method.
And finaly you should use file.listFiles() method for selecting XML files.
So, your code can looks like that:
import java.io.*;
import java.util.*;
import java.lang.String;
public class FileCopyTst1 {
public static void main(String[] args) throws IOException {
File file = new File("C:\\cluster");
File xmlFiles[] = file.listFiles(new XMLFileFilter());
for (int i = 0; i< xmlFiles.length;i++ ){
xmlFiles.renameTo(new File("C:\\testCluster\\cluster1.xml"));
}//end class
class XMLFileFilter implements java.io.FileFilter {
public boolean accept(File f) {
if (f.isDirectory()) return true;
String name = f.getName().toLowerCase();
return name.endsWith("xml");
}//end accept
}//end class HTMLFileFilter