Apache Commons IO - WildcardFileFilter Class

Overview

WildcardFileFilter class in Commons IO filters the files using the supplied wildcards.

Class Declaration

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

public class WildcardFileFilter
   extends AbstractFileFilter implements Serializable

Here is the input file we need to parse −

input.txt

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Example - Filtering a file names ending with t.

CommonsIoTester.java

package com.tutorialspoint;

import java.io.File;
import java.io.IOException;
import org.apache.commons.io.filefilter.WildcardFileFilter;

public class CommonsIoTester {
   public static void main(String[] args) throws IOException {
      //get the current directory
      File currentDirectory = new File(".");
      System.out.println("\nFile name ending with t.\n");
      WildcardFileFilter filter = WildcardFileFilter.builder().setWildcards("*t").get();
   
      String[] filesNames = currentDirectory.list(filter);
      for( int i = 0; i < filesNames.length; i++ ) {
        System.out.println(filesNames[i]);
      }
   }
}

Output

It will print the following result −

File name ending with t.

.project
input.txt
output.txt

Example - Filtering a file names starting with i.

CommonsIoTester.java

package com.tutorialspoint;

import java.io.File;
import java.io.IOException;
import org.apache.commons.io.filefilter.WildcardFileFilter;

public class CommonsIoTester {
   public static void main(String[] args) throws IOException {
      //get the current directory
      File currentDirectory = new File(".");

      System.out.println("\nFile name starting with i.\n");
      WildcardFileFilter filter = WildcardFileFilter.builder().setWildcards("i*").get();
   
      String[] filesNames = currentDirectory.list(filter);

      for( int i = 0; i < filesNames.length; i++ ) {
        System.out.println(filesNames[i]);
      }
   }
}

Output

It will print the following result −

File name starting with i.

input.txt