Java - Files object

Files

•       A File object is used to obtain or manipulate the information associated with a disk file, such as the permissions, time, date, and directory path, and to navigate subdirectory hierarchies.

•       constructors used to create File objects:

File(String directoryPath)

File(String directoryPath, String filename)

File(File dirObj, String filename)

File(URI uriObj)

Example:

import java.io.File; class FileDemo {

public static void main(String args[]) { File f1 = new File("/ip/test");

System.out.println ("File Name: " + f1.getName());

System.out.println ("Path: " + f1.getPath());

System.out.println ("Abs Path: " + f1.getAbsolutePath());

System.out.println ("Parent: " + f1.getParent());

System.out.println (f1.exists() ? "exists" : "does not exist");

System.out.println (f1.canWrite() ? "is writeable" : "is not writeable"); System.out.println (f1.canRead() ? "is readable" : "is not readable"); System.out.println ("is " + (f1.isDirectory() ? "" : "not" + " a directory")); System.out.println (f1.isFile() ? "is normal file" : "might be a named pipe"); System.out.println (f1.isAbsolute() ? "is absolute" : "is not absolute"); System.out.println ("File last modified: " + f1.lastModified()); System.out.println ("File size: " + f1.length() + " Bytes");

}

}

File Name: test

Path: /ip/test Abs

Path: /ip/test

Parent: /ip

exists

is writeable is readable

is not a directory is normal file

is absolute

File last modified: 812465204000

File size: 695 Bytes

getName( ) returns the name of the file, getParent( ) returns the name of the parent directory, and exists( ) returns true if the file exists, false if it does not.