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Java Tutorial-Java Files

Java Files

The java.io package contains the class File, allows working with the files.

To use the File class, create an object of the class, and specify the filename and directory name.

Example

import java.io.File;  //Import the File class
File myFile = new File("newfile.txt"); //Specify the filename

The File class contains many useful methods for creating and getting information about files as given below:

Method	Type	Description
canRead()	Boolean	Tests whether the file is readable or not
canWrite()	Boolean	Tests whether the file is writable or not
createNewFile()	Boolean	Creates an empty file
delete()	Boolean	Deletes a file
exists()	Boolean	Tests whether the file exists
getName()	String	Returns the name of the file
getAbsolutePath()	String	Returns the absolute pathname of the file
length()	Long	Returns the size of the file in bytes
list()	String[]	Return an array of the files in the directory
mkdir()	Boolean	Creates a directory