Java.io.File.listFiles() Method

Description

The java.io.File.listFiles(FileFilter filter) returns an array of abstract pathnames indicating the files and directories in the directory indicated by this abstract pathname that satisfy the specified filter.

Declaration

Following is the declaration for java.io.File.listFiles(FileFilter filter) method:

public File[] listFiles(FileFilter filter)

Parameters

• filter - File filter

Return Value

The method returns an array of abstract pathnames indicating the files and directories in the directory indicated by this abstract pathname that satisfy the specified filter.

Exception

• SecurityException -- If a security manager exists and its SecurityManager.checkRead(java.lang.String) method denies read access to the file

Example

The following example shows the usage of java.io.File.listFiles(FileFilter filter) method.

package com.tutorialspoint;

import java.io.File;
import java.io.FileFilter;

public class FileDemo {
   public static void main(String[] args) {
      
      File f = null;
      File[] paths;
      
      try{      
         // create new file
         f = new File("c:/test");
         
         FileFilter filter = new FileFilter() {
            @Override
            public boolean accept(File pathname) {
               return pathname.isFile();
            }
         };
         
         // returns pathnames for files and directory
         paths = f.listFiles(filter);
         
         // for each pathname in pathname array
         for(File path:paths)
         {
            // prints file and directory paths
            System.out.println(path);
         }
      }catch(Exception e){
         // if any error occurs
         e.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result:

c:\test\child_test.txt
c:\test\child_test.xlsx