File class in Java

The File object deals with physical file on the disk. It represents actual File/directory on the disk.

Package : java.io.File

Constructors 

•    File(File parent, String child);

• File(String pathname) 

• File(URI uri) 

A simple java program illustrating the operation on File object:

/*************************************************************/

import java.io.*;

class Main

{

     public static void main(String args[])

     {

           if(args.length==1)

           {              

                File f=new File(args[0]);

                System.out.println("The file Properties are : ");

               

                System.out.println("File exists ?                : "+f.exists());

                System.out.println("is File ?                    : "+f.isFile());

                System.out.println("is Directory ?               : "+f.isDirectory());

                System.out.println("can Read ?                   : "+f.canRead());

                System.out.println("can Write ?                  : "+f.canWrite());

                System.out.println("length in bytes              : "+f.length());

                System.out.println("Name                         : "+f.getName());

                System.out.println("Parent                       : "+f.getParent());

                System.out.println("Path                         : "+f.getPath());

                System.out.println("Absolute Path                : "+f.getAbsolutePath());

                System.out.println("last date of modification    : "+new java.util.Date(f.lastModified()));

           }

           else

                System.out.println("you have given wrong number of arguments at the command line !!!");

     }

}

/*************************************************************/

Pass the file name as an argument while running your program on the command line, and all the properties regarding that file will be displayed.