Solved

renameTo for directories

Posted on 1998-06-19
3
252 Views
Last Modified: 2010-03-30
I tried to rename a directory and found the logic of it
was no good. It is suppose to be if e:\cache\one.txt
exists then rename e:\cache to e:\cache1. I tried defining
the variables as File such as f1=new file("e:\cache") but
no luck. I dont understand the arg[] idea too well. Can you
tell me a good source on addition instructions for renameTo?
0
Comment
Question by:johnh619
  • 2
3 Comments
 
LVL 1

Accepted Solution

by:
ragnar earned 50 total points
ID: 1223416
Do the following:

File f = new File("E:" + File.separator + "cache");

the backslash character was escaping c, which meant "stay on the same line."  The file separator is a platorm neutral version of a / or \ or : directory separator.  You might consider using a FileDialog to prompt the user for the location of the cache.  if you want details on how to do this, just email me and i'll show you some examples.

Regarding args[],

your main function looks like this:

  public static void main(String[] args)

args is an array that refers to the command line arguments.  if the program has any arguments you can pick them up.  For example if the program was invoked like:

% java myProgram firstArg secondArg

then in your code you could reference the arguments like:

String frist  = args[0];
String second = args[1];

Notice that this is different from C++ where args[0] refers to the name of the program, while in Java it refers to the first argument.

Good luck!
0
 

Author Comment

by:johnh619
ID: 1223417
I assume then that number args are only for the command line.
So I am not wanting to use the command line as input. I will
use choice box. I think your suggestion for file separator may
fix my problems though, so thanks. John H
0
 
LVL 1

Expert Comment

by:ragnar
ID: 1223418
yes, the num of arguments is only for the command line.  Good luck!
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question