FileReadWriteTest - File IO

package iopack;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileReadWriteTest
{

public static void main(String[] args)
{
File f = new File("D:\\exp.txt");
File f1 = new File("D:\\mailto.txt");


System.out.println(f.exists());
FileInputStream fis = null;
FileOutputStream fos = null;

try
{
fos = new FileOutputStream(f1);
fis= new FileInputStream(f);
int ch = 0;
char chr = 'm' ;
while ((ch = fis.read()) !=-1)
{

fos.write(chr);
chr= (char)ch;
System.out.print((char)ch);
}


}

catch (FileNotFoundException e)
{
e.printStackTrace();
}


catch(NullPointerException n)
{
n.printStackTrace();
}

catch (IOException e)
{
e.printStackTrace();
}

finally
{
try
{
fis.close();
System.out.println("Closed");

}
catch (IOException e)
{
e.printStackTrace();
}
}

}

}