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Java Basic

Java Home

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Java Introduction

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Java Get Started

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Java Syntax

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Java Output / Print

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Java Comments

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Java Variables

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Java Data Types

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Java Type Casting

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Java Operators

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Java Strings

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Java Math

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Java Booleans

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Java If ... Else

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Java Switch

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Java While Loop

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Java For Loop

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Java Break / Continue

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Java Arrays

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Java Methods

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Java Classes

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Java file Handling

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Java How To

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Java Reference

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Java String Methods

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Java Math Methods

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Java Output Methods

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Java Arrays Methods

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Java ArrayList Methods

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Java LinkedList Methods

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Java HashMap Methods

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Java Errors and Exception

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Text lesson

Java Files

File handling constitutes a crucial aspect of any application.

Java provides various methods for creating, reading, updating, and deleting files.

Java File Handling

The File class from the java.io package facilitates file manipulation.

To utilize the File class, instantiate 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’re unfamiliar with the concept of a package, refer to our Java Packages Tutorial for clarification.

The File class offers numerous helpful methods for file creation and retrieval of file information. For instance:

Method	Type	Description
`canRead()`	Boolean	Determines whether the file is readable
`canWrite()`	Boolean	Checks whether the file is writable or not.
`createNewFile()`	Boolean	Generate an empty file.
`delete()`	Boolean	Delete a file.
`exists()`	Boolean	Check if the file exists.
`getName()`	String	Retrieve the name of the file.
`getAbsolutePath()`	String	Retrieve the absolute pathname of the file.
`length()`	Long	Retrieve the size of the file in bytes.
`list()`	String[]	Retrieve an array containing files in the directory.
`mkdir()`	Boolean	Create a directory.

In the upcoming chapters, you’ll discover how to create, write to, read from, and delete files.