creating a file in java

import java.io.*;

public class Write_File {
    public static void main(String args[]) throws IOException {
        File flt = new File("codingdiary.doc");
        FileWriter wrt = new FileWriter(flt);

        CharSequence cq = "welcome to future";

        wrt.append(cq);
        wrt.flush();
        System.out.println("Output is generated in a file codingdiary.doc");

        flt = new File("sateesh.txt");
        PrintWriter out = new PrintWriter(new BufferedWriter(
                new FileWriter(flt)));
        out.print("Welcome to java programming");
        out.flush();
        System.out.println("Output is generated in a file sateesh.txt");

        flt = new File("rachel_weisz");
        flt.createNewFile();
        System.out.println("An unknown extension file rachel_weisz is created");

        CharArrayWriter ch = new CharArrayWriter();
        cq = "newstrackindia.com";
        ch.append(cq);
        ch.flush();
        System.out.println(ch.toString());

    }
}