Create a human-readable file size

   
import org.apache.commons.io.FileUtils;

import java.io.File;

public class Main {
  public static void main(String[] args) {
    File file = new File("c:\\java.exe");

    long size = file.length();
    String display = FileUtils.byteCountToDisplaySize(size);

    System.out.println("Name    = " + file.getName());
    System.out.println("size    = " + size);
    System.out.println("Display = " + display);
  }
}

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Create a human-readable file size : Files « File Input Output « Java

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