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); } }