File class in java in hindi

File class in java

Hello guys, in this video you will learn about File class, its constructors, and methods.
Signature:
public class File
extends Object
implements Serializable, Comparable

The File class is defined in the java.io package.
The file class provides an abstract representation of file and directory pathnames. This class presents an abstract, system-independent view of hierarchical pathnames. An abstract pathname has two components:
1. An optional system-dependent prefix string, such as a disk-drive specifier, "/" for the UNIX root directory, or "\\\\" for a Microsoft Windows UNC pathname.
2. A sequence of zero or more string names.
The first name in an abstract pathname may be a directory name or, drive, a hostname.
Each subsequent name in an abstract pathname denotes a directory; the last name may denote either a directory or a file.
Instances of this class may or may not denote an actual file-system object such as a file or a directory.
This class contains methods for working with the pathname, deleting and renaming files, creating new directories, listing the contents of a directory, and determining several common attributes of files and directories.
The File class does not provide any method for reading or writing the contents of the file. File reading and writing operations are performed with the help of the Stream classes, which we will discuss later.
File class constructor
1. File(File parent, String child): Creates a new File instance from a parent abstract pathname and a child pathname string.
2. File(String pathname): Creates a new File instance by converting the given pathname string into an abstract pathname.
3. File(String parent, String child): Creates a new File instance from a parent pathname string and a child pathname string.
4. File(URI uri): Creates a new File instance by converting the given file: URI into an abstract pathname.
The URI class is defined in the java.net package.

In this video we will discuss the following four methods of File class, the rest of the methods will be discussed in the upcoming videos.
Method Signature Method Working
boolean exists() Tests whether the file or directory denoted by this abstract pathname exists.
boolean isDirectory()
Tests whether the file denoted by this abstract pathname is a directory.
boolean isFile()
Tests whether the file denoted by this abstract pathname is a normal file.
String getName() Returns the name of the file or directory denoted by this abstract pathname.

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