import java.io.*; 
public class BufferedOutputStreamExample{ 
public static void main(String args[])throws Exception{ 
FileOutputStream fout=new FileOutputStream("D:\\testtxt"); 
BufferedOutputStream bout=new BufferedOutputStream(fout); 
String s="Welcome to freetimelearn."; 
byte b[]=s.getBytes(); 
bout.write(b); 
bout.flush(); 
bout.close(); 
fout.close(); 
System.out.println("success..........."); 
} 
}

import java.io.*; 
public class BufferedInputStreamExample{ 
public static void main(String args[]){ 
try{ 
FileInputStream fin=new FileInputStream("D:\\test.txt"); 
BufferedInputStream bin=new BufferedInputStream(fin); 
int i; 
while((i=bin.read())!=-1){ 
System.out.print((char)i); 
} 
bin.close(); 
fin.close(); 
}catch(Exception e){System.out.println(e);} 
} 
}

import java.io.*; 
class Test 
{ 
static BufferedInputStream bis; 
static BufferedOutputStream bos; 
public static void main(String[] args) 
{ 
try{ 
bis=new BufferedInputStream(new FileInputStream("abc.txt")); 
bos=new BufferedOutputStream(new FileOutputStream("xyz.txt")); 
int str; 
while ((str=bis.read())!=-1) 
{ 
bos.write(str); 
} 
bis.close();
bos.close(); 
} 
catch(Exception e) 
{ 
System.out.println(e); 
System.out.println("getting Exception"); 
} 
} 
}