import java.io.*;
public class append{
public static void main(String[] args) throws IOException {
FileInputStream Message_File=new FileInputStream ("C:/JBuilder4/lib/input6.txt");
BufferedReader buff=new BufferedReader(new InputStreamReader(Message_File));
String Input_Message=new String();
System.out.println("Your input message is as following:");
int c;
while ((c = buff.read()) != -1){
FileOutputStream out = new FileOutputStream("C:/JBuilder4/lib/output6.txt", true);
buff.close();
out.close();
}}
}

import java.io.*;
 
public class append_files {
public static void main(String[] args) throws IOException {
try {
// create writer for file to append to
BufferedWriter out = new BufferedWriter(
new FileWriter("C:/JBuilder4/lib/output6.txt", true));
// create reader for file to append from
BufferedReader in = new BufferedReader(new FileReader("C:/JBuilder4/lib/output4.txt"));
String str;
while ((str = in.readLine()) != null) {
out.write(str);
}
in.close();
out.close();
 
 
} catch (IOException e) {
} }}