What's wrong with my simple IO code?

Question

import java.io.*;
public class test4
public static void main(String arg[])throws IOException
File f=new File("u:/temp.txt");
f.createNewFile();
FileWriter fwriter=new FileWriter(f,true);     
fwriter.write("can you see me?");
}

Answer 1

You have to close your, and you really should flush,
your fwriter before sending any data to file:You mean after sending any data, right? ;)
fwriter.flush();
fwriter.close();I suppose it doesn't hurt to be explicit, but the flush() isn't strictly necessary as close() flushes the stream before closing it (as per the API docs). I'll leave it to you as to what level of verbosity you want.