Apache Commons IO - SuffixFileFilter

Filters files based on suffix. This is used in retrieving all the files of a particular type.

Class Declaration

Following is the declaration for org.apache.commons.io.filefilter.SuffixFileFilter Class −

public class SuffixFileFilter
   extends AbstractFileFilter implements Serializable

Example of SuffixFileFilter Class

Here is the input file we need to parse −

Welcome to Howcodex. Simply Easy Learning.

Let's print all files and directories in the current directory and then filter a file with extension txt.

IOTester.java

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.filefilter.SuffixFileFilter;

public class IOTester {
   public static void main(String[] args) {
      try {
         usingSuffixFileFilter();
      } catch(IOException e) {
         System.out.println(e.getMessage());
      }
   }

   public static void usingSuffixFileFilter() throws IOException {
      //get the current directory
      File currentDirectory = new File(".");
      
      //get names of all files and directory in current directory
      String[] files = currentDirectory.list();
      System.out.println("All files and Folders.\n");
      for( int i = 0; i < files.length; i++ ) {
         System.out.println(files[i]);
      }
      
      System.out.println("\nFile with extenstion txt\n");
      String[] filesNames = currentDirectory.list( new SuffixFileFilter("txt") );
      for( int i = 0; i < filesNames.length; i++ ) {
         System.out.println(filesNames[i]);
      }
   }
}

Output

It will print the following result.

All files and Folders.

.classpath
.project
.settings
bin
input.txt
src

File with extenstion txt

input.txt