• Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

File constructor

 
siddharth das
Ranch Hand
Posts: 135
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
File directory = new File(�d�);
File file = new File(directory,�f�);
Can you explain this statements.
Thanks.
 
Ankit Garg
Sheriff
Posts: 9528
33
Android Google Web Toolkit Hibernate IntelliJ IDE Java Spring
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Lets take an example. Suppose your program is in the directory

/home/siddharth/java

then

File directory = new File("d");

here directory will point to the path

/home/siddharth/java/d

this d can be a file or directory. Now the second statement

File file = new File(directory,"f");

Now this object named file will point to the path

/home/siddharth/java/d/f

so basically if you provide two parameters to the file constructor, then the first parameter points to the directory inside which the second parameter will point to...
 
siddharth das
Ranch Hand
Posts: 135
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
if I write the following statement
File file = new File(directory,"h.txt");
instead of
File file = new File(directory,"f");

then what will happen?
 
Ankit Garg
Sheriff
Posts: 9528
33
Android Google Web Toolkit Hibernate IntelliJ IDE Java Spring
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
then file = new File(directory,"h.txt"); will point to h.txt inside the directory pointed by directory object...
 
siddharth das
Ranch Hand
Posts: 135
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
But I do not find any text file is created.
 
Narendra shah
Ranch Hand
Posts: 52
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hey Dear,

You need to add following statement also as such new File will not create physical file for you.

file.createNewFile() if this is true then your file is created else not.
 
siddharth das
Ranch Hand
Posts: 135
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
public static void main(String[] args) {
File p = new File("a");
File f = new File(p,"h.txt");
System.out.println(f.getAbsolutePath());

try

{
f.createNewFile();
}
catch(Exception e){System.out.println("test");}



}

In this case,there is no text file is created.But exception is thrown.
Output is test
 
Fabian Angy
Ranch Hand
Posts: 90
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Does your directory "a" exist before the creation of the file?
 
Pranav Patel
Greenhorn
Posts: 6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You need to create dir.

File p = new File("a");
p.mkdir();
File f = new File(p,"h.txt");
System.out.println(f.getAbsolutePath());

try

{
f.createNewFile();
}
catch(Exception e){System.out.println("test");}



}
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic