We must read other File operations like - create, copy, move, rename, delete, exist?, append, hide/unHide, creation/lastModified/lastAccessed date, compare, Read only and writable.
File's length() method of File is used to find file size in bytes
Method return file length in bytes.
Program to find Find file size in bytes, Kilobytes, megabytes and gigabytes using length method of File in java >
/** JavaMadeSoEasy.com */
import java.io.File;
public class FileSize {
public static void main(String[] args) {
String fileName = "c:/myTxt.txt";
File file = new File(fileName);
/*
* length() method of File is used to find file size in bytes Method
* return file length in bytes.
*/
long fileSizeInBytes = file.length();
//1 kilobyte = 1024 byte
float fileSizeInKB = file.length() / 1024;
//1 megabyte = 1024 kilobyte
//or
//1 megabyte = 1024 * 1024 byte
float fileSizeInMB = fileSizeInKB / 1024;
//1 gigabyte = 1024 megabyte
//or
//1 gigabyte = 1024 * 1024 * 1024 byte
float fileSizeInGB = fileSizeInMB / 1024;
//1 terabyte = 1024 gigabyte
//or
//1 terabyte = 1024 * 1024 * 1024 * 1024 byte
float fileSizeInTB = fileSizeInGB / 1024;
System.out.println(fileName + " size in bytes = " + fileSizeInBytes);
System.out.println(fileName + " size in kilobytes = " + fileSizeInKB);
System.out.println(fileName + " size in megabytes = " + fileSizeInMB);
System.out.println(fileName + " size in gigabytes = " + fileSizeInGB);
System.out.println(fileName + " size in terabytes = " + fileSizeInTB);
}
}
/*OUTPUT
c:/myTxt.txt size in bytes = 14157000
c:/myTxt.txt size in kilobytes = 13825.0
c:/myTxt.txt size in megabytes = 13.500977
c:/myTxt.txt size in gigabytes = 0.013184547
c:/myTxt.txt size in terabytes = 1.2875535E-5
*/
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Labels:
Core Java
File IO/File handling