File Class

Returns a long value representing a cyclic redundancy check (CRC-32 checksum) of the file, or -1 if not known.

Creates a copy of this object.

Used to create a copy of this file. Preserves the last modified date associated with the source file. Returns true if the file was copied successfully.

Used to create a copy of this file. Preserves the last modified date associated with the source file. Returns true if the file was copied successfully.

Creates a new file if one does not exist.

Used to delete the file. Warning: this operation is irrecoverable.

Used to determine whether a file exists. Returns false if the file system can't find the file or if the object is a directory.

Used to extract the contents of the file into a BufferedReader.

   BufferedReader br = file.getBufferedReader("UTF-8");
   String strLine;
   while ((strLine = br.readLine()) != null){
      System.out.println(strLine);
   }
   

Used to extract the contents of the file into a BufferedReader.

   BufferedReader br = file.getBufferedReader("UTF-8");
   String strLine;
   while ((strLine = br.readLine()) != null){
      System.out.println (strLine);
   }
   

WARNING: This method will never throw an error.

Used to instantiate a BufferedWriter for this file.

Returns a ByteArrayOutputStream for the file. Returns a null if a ByteArrayOutputStream cannot be created (e.g. file does not exist).

Returns the mime type associated with the file extension. This method only covers the most common/popular mime types. The returned mime type is NOT authoritative.

Returns the mime type associated with the file extension found in a given file name. This method only covers the most common/popular mime types. The returned mime type is NOT authoritative.

Returns a timestamp of when the file was first created. Returns a null if the timestamp is not available.

Returns a timestamp of when the file was last modified. Returns null if the file does not exist or if the object is a directory.

Returns the file's parent directory. Same as getParentDirectory()

Returns the file's extension, excluding the last dot/period (e.g. "C:\image.jpg" will return "jpg"). Returns a zero-length string if there is no extension.

Returns keywords representing file attributes (e.g. "READONLY", "HIDDEN", etc).

Used to open the file and read the contents into an image.

Returns a new FileInputStream Object

Returns a timestamp of when the file was last accessed. Returns a null if the timestamp is not available.

Returns a timestamp of when the file was last modified. This is identical to the getDate() method.

Returns the target of a symbolic link, Windows junction, or Windows shortcut.

Returns a string representing the MD5 hash for the file.

Returns the name of the file, excluding the path.

Returns the name of the file, excluding the path.

Returns a new FileOutputStream Object

Returns the file's parent directory. Returns null if the parent directory is unknown.

Used to retrieve the path to the file, excluding the file name. Appends a file separator to the end of the string.

Returns a string representing the SHA-1 hash for the file.

Returns the size of the file, in bytes. Returns 0L if the file is does not exist or if the object is a directory.

Used to open the file and read the contents into a string.

Used to extract the contents of the file as a String. Returns an empty String if the file is empty or the contents cannot be converted to a String.

Returns an XML DOM Document (org.w3c.dom.Document) represented by this file. Returns a null if the file contents cannot be converted into a DOM Document.

Used to check whether the file has execute permissions. Note that this method is not supported by JDK 1.5 or lower. Instead, the method will return false.

Used to check whether the file is hidden. Returns true if the file exists and is hidden according to the conventions of the underlying file system.

Used to determine whether the file is actually a link to another file. Returns true for symbolic links, Windows junctions, and Windows shortcuts.

Used to check whether the file has write permissions. Returns true if the file exists and the application is not allowed to write to the file.

Used to move the file to a different directory. If the operation is successful, returns a handle to the new file. Otherwise, the original file is returned.

Used to move the file to a different location. If the operation is successful, returns a handle to the new file. Otherwise, the original file is returned.

Used to rename the file. The existing file name is replaced with a new name. Only the file name is affected. The file path remains unchanged. This method is therefore different from the java.io.File "renameTo" method. If the operation is successful, returns a handle to the new file. Otherwise, the original file is returned.

Used to set the size of the buffer used to read/write bytes. The default is 1MB (1,048,576 bytes)

Used to set/update the last modified date.

Used to update the timestamp of when the file was last modified.

Returns the java.io.File representation of this object.

Returns the full file path (including the file name)

Creates a new file using the given ByteArrayOutputStream. Note that this method will convert the ByteArrayOutputStream to a byte array using the toByteArray() method which may result in memory issues.

Creates a new file using the given byte array.

Creates a new file using the given InputStream. Note that the caller is responsible for closing the input stream after the method is complete.

Used to write text to a file. Uses UTF-8 character encoding. Use the other write method to specify a different character encoding (e.g. ISO-8859-1).

Used to write an XML DOM Document to a file.

Used to write text to a file using an array of strings. A new line is created for each entry in the array.

Used to write an image to a file.

Used to write text to a file. Allows users to specify character encoding.