คำนวณและแสดงผล Size ของ File ด้วย FileUtils Apache Commons : java

...
...
import org.apache.commons.io.FileUtils;
...
...
...
    //FileUtils.byteCountToDisplaySize(long size)  return String

    System.out.println(FileUtils.byteCountToDisplaySize(154));
    //154 byte

    System.out.println(FileUtils.byteCountToDisplaySize(1024));
    //1 KB

    System.out.println(FileUtils.byteCountToDisplaySize(1024000));
    //1 MB

    System.out.println(FileUtils.byteCountToDisplaySize(125468));
    //122.527 MB

    System.out.println(FileUtils.byteCountToDisplaySize(56314));
    //54.994 MB
...
...