programming-examples/java/Core_Java/Check for Files.java

Check for Files

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

/**
* Create filelist.txt file by your self.
*/
    public class CheckFiles {
         public static void main(String[] argv) {
         CheckFiles cf = new CheckFiles();
         System.out.println("CheckFiles starting.");
         cf.getListFromFile();
         cf.getListFromDirectory();
         cf.reportMissingFiles();
         System.out.println("CheckFiles done.");
     }
     public String FILENAME = "filelist.txt";
    
     protected ArrayList listFromFile;
     protected ArrayList listFromDir = new ArrayList();
    
         protected void getListFromFile() {
         listFromFile = new ArrayList();
         BufferedReader is;
             try {
             is = new BufferedReader(new FileReader(FILENAME));
             String line;
             while ((line = is.readLine()) != null)
             listFromFile.add(line);
             } catch (FileNotFoundException e) {
             System.err.println("Can't open file list file.");
             return;
             } catch (IOException e) {
             System.err.println("Error reading file list");
             return;
         }
     }
    
     /** Get list of names from the directory */
         protected void getListFromDirectory() {
         listFromDir = new ArrayList();
         String[] l = new java.io.File(".").list();
         for (int i=0; i         listFromDir.add(l[i]);
     }
    
         protected void reportMissingFiles() {
         for (int i=0; i         if (!listFromDir.contains(listFromFile.get(i)))
         System.err.println("File " + listFromFile.get(i) + " missing.");
     }
}