Question

I am working in a desktop application for windows using Java. In my application, there is a requirement to search all .php. To do this,

here I use recursive methods.

import java.io.File;

public class Copier {

    public static void find(String source,String rep) {
        File src = new File(rep);
        if (src!= null && src.exists() && src.isDirectory()) {
            String[] tab = src.list();
            if (tab != null) {
                for(String s : tab) {
                    File srcc = new File(rep+"\\"+s);
                    if (srcc.isFile()) {  
                        if (srcc.getName().matches(".*"+source+"$")) {
                            System.out.println(s);
                        }
                    } else {
                        find(source,srcc.getAbsolutePath());
                    }
                }
            } else {
                //System.out.println(" list is null");
            }
        }
    }

and here i use iterative algorithm with breadth-first-search with queue but it not work

import java.io.File;
import java.util.LinkedList;


public class Copier {
public static void find(String source,String rep)
{
    File src=new File(rep);
    LinkedList<File> qu=new LinkedList();
    if(src!=null && src.exists() && src.isDirectory())
    {
        File[] tab=src.listFiles();
        if(tab!=null)
        {
        for(File s:tab)
        {
            qu.addLast(s);
        }
        while(!qu.isEmpty())
        {
            File srcc=qu.getFirst();
            qu.removeFirst();
            if(srcc.isFile())
            {
                if(srcc.getName().matches(".*"+source+"$"))
                    System.out.println(srcc.getName());
            }

            else
            {
                System.out.println(srcc.getName());
                qu.addLast(srcc);
            }
        }

        }
    }
}

public static void main(String[] args)
{
        try {
            find(".php","C:\\AppServ");
        } catch (Exception e) {
            e.printStackTrace();
        }

}
}

Answer 1

Anouar,

try to use Apache Commons IO.
You can use class

org.apache.commons.io.FileUtils

described here in API Javadoc.

It provides very useful, performance-optimized and bug-free static methods to search files (listFiles and iterateFiles methods), copy/move files and directories, reading files to String in “one-line-of-code” and many more nice stuff.

There is no need to reinvent the wheel 😉