new at java can i copy files or add to files

[Triple__J]

Hi I wrote this but not sure how to get it to add to the new.txt is there a way to do that.

import java.io.*;

public class Copy
{
public static void main(String[] args) throws IOException
{
File inputFile = new File("test.txt");
File outputFile = new File("new.txt");

FileReader in = new FileReader(inputFile);
FileWriter out = new FileWriter(outputFile);
int c;

while ((c = in.read()) != -1)
out.write(c);

in.close();
out.close();
}
}

just not to sure if it can be done or if the book I'm looking at has that info. Thanks

[arcane_III]

in the FileWriter constructor there is a boolean flag append.

just change your code to:
FileWriter out = new FileWriter(outputFile,true);

here is a link to the Java Online documentation.

you can also download the documentation at this site.

[Triple__J]

Originally posted by arcane_III
in the FileWriter constructor there is a boolean flag append.

just change your code to:
FileWriter out = new FileWriter(outputFile,true);

here is a link to the Java Online documentation.

you can also download the documentation at this site.

tried that but get the this error
Incompatible type for constructor. Can't convert java.io.File to java.lang.String.
FileWriter out = new FileWriter(outputFile,true);

do i just add java.lang.String

[Malone]

Check the documentation on that, I know a bit about java but not much about I/O and creating files. Anyway, it looks like the FileWriter constructor takes a String as it's first argument, and you have the outputFile variable declared as a File, not a String. Hence the incompatible type error.

Try declaring outputFile as a String, just to see what happens. In fact get rid of the whole declaration cause it looks like you don't really need it. Then just construct a FileMaker object wiht an empty String.

FileMaker out = new FileMaker("");