Get file size : Files « File Input Output « Java

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Java » File Input Output » Files Screenshots  Get file size     import java.io.File; public class Main {   public static long getFileSize(String filename) {     File file = new File(filename);     if (!file.exists() || !file.isFile()) {       System.out.println("File doesn\'t exist");       return -1;     }     return file.length();   }   public static void main(String[] args) {     long size = getFileSize("c:/my.txt");     System.out.println("Filesize in bytes: " + size);   } }                  Related examples in the same category 1.  Create file 2.  Create a temporary file 3.  Creating a Temporary File and delete it on exit 4.  Create a directory (or several directories) 5.  Change last modified time of a file or directory 6.  Construct file path 7.  Create temporary file with specified extension suffix 8.  Create temporary file in specified directory 9.  Create new empty file 10.  Compare two file paths 11.  Delete a file 12.  Delete file or directory 13.  Deleting a Directory (an empty directory) 14.  Delete file or directory when virtual machine terminates 15.  Determine File or Directory 16.  Determine if a file can be read 17.  Determine if a file can be written 18.  Determine if file or directory exists 19.  Determine if File or Directory is hidden 20.  Demonstrate File. 21.  Moving a File or Directory to Another Directory 22.  Find out the directory 23.  Get all path information from java.io.File 24.  Getting an Absolute Filename Path from a Relative Filename Path 25.  Getting an Absolute Filename Path from a Relative Filename with Path 26.  Getting an Absolute Filename Path from a Relative Filename parent Path 27.  Get Absolute path of the file 28.  Get File size in bytes 29.  Get parent directory as a File object 30.  Get a file last modification date 31.  File.getCanonicalFile() converts a filename path to a unique canonical form suitable for comparisons. 32.  Getting the Parents of a Filename Path 33.  Get the parents of an absolute filename path 34.  Getting and Setting the Modification Time of a File or Directory 35.  Mark file or directory Read Only 36.  List Filesystem roots 37.  List drives 38.  Listing the Directory Contents 39.  Rename file or directory 40.  Forcing Updates to a File to the Disk 41.  Random File 42.  Create a directory; all ancestor directories must exist 43.  Create a directory; all non-existent ancestor directories are automatically created 44.  Getting the Current Working Directory 45.  Change a file attribute to writable 46.  Data file 47.  Output to a text File 48.  Choose a File 49.  Read data from text file 50.  Copy File 51.  Querying a File for Information 52.  Working with RandomAccessFile 53.  Get a list of files, and check if any files are missing 54.  Delete a file from within Java 55.  Work with temporary files in Java 56.  Compare File Dates 57.  Sort files base on their last modified date 58.  Strings -- extract printable strings from binary file 59.  Get extension, path and file name 60.  Read file contents to string using commons-io? 61.  Get all xml files by file extension 62.  File Name Bean 63.  Get icon for file type 64.  Change a file attribute to read only 65.  Get file extension name 66.  Search for files recursively 67.  Create a human-readable file size 68.  Set file attributes. 69.  Format file length in string 70.  Return a file with the given filename creating the necessary directories if not present.