Renaming and deleting text files

[shubhang]

I have made this delete class of my address book program.
It gives an error when I use the renameTo() function.
Please look into my program.

import java.io.*;
import java.util.*;
class del
{

	private String stru,strf;
	BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
	public void calc()throws IOException
	{
		System.out.println("enter record to be deleted");
		stru=br.readLine();

		BufferedReader in=new BufferedReader(new FileReader("adbk.txt"));

		File fi=new File("tadbk.txt");

		PrintWriter p=new PrintWriter(new FileWriter("tadbk.txt",true));

		while((strf=in.readLine())!=null)
		{
			if(stru==strf)
			{
				continue;
			}
			else
			{
				p.println(strf);
			}
		}
		p.close();
		fi.renameTo("adbk.txt");//gives error here
		fi.delete();
	}
}

Please tell me how to go about it.
Thanks in advance.

[Antenka]

Here is part of description of this function, given by java help:
public boolean renameTo(File dest)

It asks a File as parameter, but you give String to it.

[bondo]

http://java.sun.com/javase/6/docs/api/java/io/File.html#renameTo(java.io.File)

Check that out. It's expecting a file, not a string. It seems like you need to create a new file with a filename of what you want to rename the file to and pass that into renameTo().

[bondo]

Whoops, too slow. Check out the javadocs though, it might be helpful in explaining what you need to do.