This example illustates how to seach for a
given file in given directory.

import java.io.*;
import java.util.ArrayList;

public class SearchFileSystem{

  //Search all file roots (c:, d:, etc.)
  //Modified to return List of files

  ArrayList files = new ArrayList();

  public ArrayList searchFile(String name) throws Exception { 
  File[] roots = File.listRoots();
  if(roots != null) {
    for (int i = 0 ; i < roots.length ; i++) {   
 ArrayList aux = recursiveSearch(roots[i], name);
    if (aux != null && aux.contains(name)) {  
          files.add(roots[i].getCanonicalPath());     
        }    
     }
   }
   return files; 
  }

  //Search from specified root
  //Modified to return List of files

  public ArrayList recursiveSearch(File f, String name) throws Exception {  
  if(f.exists()) {
   File[] childs = f.listFiles();
   if(childs != null) { 
    for (int i = 0 ;i < childs.length ; i++) {   
      if (childs[i].isDirectory()) { 
       ArrayList aux = recursiveSearch(childs[i], name);   
       if (aux != null && aux.contains(name)) {  
         files.add(childs[i].getCanonicalPath());     
       }   
      } else if (name.compareTo(childs[i].getName()) == 0) {  
         files.add(childs[i].getCanonicalPath());        
      } 
     } 
    }
   }
   return files;
  }
 
}

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