BE THE CODER > Tools and Libs > Commons IO Examples > Filters

Apache Commons IO is a java library with simple IO utilities and filters. This requires the library commons-io-2.1.jar to be in classpath. The following example shows using FileFilterUtils.prefixFileFilter() API. It returns a filter that returns TRUE if the filename starts with the specified prefix.

File Name :	com/bethecoder/tutorials/commons_io/tests/filters/PrefixFileFilterTest.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.commons_io.tests.filters;



import java.io.File;

import java.io.IOException;



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

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



public class PrefixFileFilterTest {



  /**

   * @param args

   * @throws IOException 

   */

  public static void main(String[] args) {

    File directory = new File("C:/input");

    

    String[] files = directory.list(FileFilterUtils.prefixFileFilter("t"));

     for (String file : files) {

         System.out.println(file);

     }

     

     System.out.println();

     files = directory.list(new PrefixFileFilter(new String [] {

         "t", "re", "wri"

     }));

     

     for (String file : files) {

         System.out.println(file);

     }

  }

}

Prefix File Filter