Java Program on File Handling using Character Stream

Program 1

package dataflair;
import java.io.*;
public class TestWriter 
{
       public static void main(String args[])throws IOException
       {
            File F=new File("c://dataflairfile/student.txt");
            FileWriter fw=null;
            try
            {     
             fw=new FileWriter(F,true);
             char ch='D';
             fw.flush();
             fw.write(ch);
              System.out.println("File created......");
            }
            finally
            {
                fw.close();
            }
             
       }
}

Program 2

package dataflair;
import java.io.*;

public class TestWriter1 
{
    public static void main(String[] args) throws IOException
    {
          File F=new File("c://dataflairfile/student.txt");
            FileWriter fw=null;
            try
            {     
             fw=new FileWriter(F);
             String str="Data Flair Free Courses... with free certification...";
             fw.flush();
             char ch[];
             ch=str.toCharArray();
             fw.write(ch);
//             char ch;
//             for(int i=0;i<str.length();i++)
//             {
//                 ch=str.charAt(i);
//                 fw.write(ch);
//             }    
              System.out.println("File created......");
            }
            finally
            {
                fw.close();
            }    
    }
    
}