Java Program: File I/O Fileoutputstream to create file

Program

import java.io.*;
public class createfile {
    public static void main(String[] args)
    {
        try
        {
        createfile();
        }
        catch(Exception ex)
        {
            System.out.println("File Exceptio occured");
        }    
    }
    public static void createfile() throws java.io.IOException
    {
        DataInputStream d=new DataInputStream(System.in);
        FileOutputStream f=new FileOutputStream("jack.txt",true);
        BufferedOutputStream b=new BufferedOutputStream(f,1024);
        System.out.println("Enter $ at the end to finish text");
        char c;
        while((c=(char)d.read())!='$')
        {
            b.write(c);          
        }
        b.close();
    }

}

Output