Java - Java Program to Count Number of Files

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Java Program to Count Number of Files

50,000 HTML files are in a folder on a windows machine. Among them, content of some files
(not the file names) contain the sentence "SocioMaC-Jus' Follow!". Write a Java program to count the number of such files.

Total Answers and Comments: 3

Last Update: November 01, 2009 Asked by: anjankumar_m

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Best Rated Answer

—

Submitted by: bh2008

Implement java.io.FileFilter interface and accept method.
Use java.io.File class listFiles(FileFilter) method to filter.

Above answer was rated as good by the following members:
ugesh.gali

October 08, 2008 01:23:24

bh2008

Member Since: June 2008 Contribution: 3

RE: Java Program to Count Number of Files

Implement java.io.FileFilter interface and accept method.
Use java.io.File class listFiles(FileFilter) method to filter.

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1 0

Overall Rating: +1

August 20, 2009 07:15:10

Sarje

Member Since: August 2009 Contribution: 62

RE: Java Program to Count Number of Files

You can count the number of .html .htm files having any pattern suppose "Ram" using following code.

import java.io.*;
import java.util.Scanner;
public class HtmlFileFilter implements FileFilter
{
public boolean accept(File pathname)
{
if (pathname.getName().endsWith(".html")) return true;
if (pathname.getName().endsWith(".htm")) return true;
return false;
}
public static void main(String args[])throws IOException
{
int counter 0;
FileFilter ob new HtmlFileFilter();
File dir new File("E:/Sarje");
File[] files dir.listFiles(ob);
for(File f : files)
{
InputStream fis new FileInputStream(f);
Scanner scan new Scanner(fis);
while(scan.hasNext())
{
if(scan.next().equals("Ram"))
counter++;
}
}
System.out.println("Number of files:"+counter);
}
}

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October 30, 2009 12:16:50

kneebrains

Member Since: October 2009 Contribution: 2

RE: Java Program to Count Number of Files

If you need to _search_ random strings - use lucene. Otherwise i think sarje has the answer.
Can you not write the text parsing in the file filter ?

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