Apache Commons IO - SizeFileComparator


SizeFileComparator compare the sizes of two files/directory. It can be used to sort the lists or arrays of files using their size or directories, based on their number of children.

Class Declaration

Following is the declaration for

org.apache.commons.io.comparator.SizeFileComparator Class −

public class SizeFileComparator
   extends Object implements Serializable

Example of SizeFileComparator Class

Here is the input file we need to parse −

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import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import org.apache.commons.io.comparator.SizeFileComparator;
import org.apache.commons.io.filefilter.FileFileFilter;
public class IOTester {
   public static void main(String[] args) {
      try {
      } catch(IOException e) {
   public static void usingSizeFileComparator() throws IOException {
      //get the current directory
      File currentDirectory = new File(".");
      SizeFileComparator comparator = new SizeFileComparator();
      File[] sortedFiles = comparator.sort(currentDirectory.listFiles((FileFilter)FileFileFilter.FILE));
      System.out.println("Sorted By Size: ");
      for(File file:sortedFiles) {
         System.out.println(file.getName() + ", size(kb) :" + file.length());


It will print the following result.

Sorted By Size:
input.txt, size:124
.project, size:382
.classpath, size:441