Login

File handling is an important part of any application.

Java has several methods for creating, reading, updating, and deleting files.

Java File Handling

The File class from the java.io package, allows us to work with files.

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

Example

import java.io.File;  // Import the File class

 

File myObj = new File("filename.txt"); // Specify the filename

If you don't know what a package is, read our Java Packages Tutorial.

The File class has many useful methods for creating and getting information about files. For example:

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[]

Returns an array of the files in the directory

mkdir()

Boolean

Creates a directory

 

 

 

Login
ADS CODE