please can you help me in this BankAccount code i do it but the teacher remove some my code and ask me when i see complete i complete but i when i do it i have some error can you help me i will post my code
the client code:
import java.io.*;
import java.net.*;
public class Client{
static Socket conn = null;
static PrintWriter writer = null;
static BufferedReader reader = null;
// Method which connect the client to the service (identified by port)
// provided by the server (identified by ipaddr).
// If the connection is successful, it return true.
public static boolean connect(String ipaddr, int port) {
try { // Connect to server
conn = new Socket(ipaddr, port);
} catch (IOException e) {
System.err.println("Cannot connect to " + ipaddr +"/"+ port);
System.exit(1);
}
try { // Get a reading and writing channels to the connection.
writer = new PrintWriter(conn.getOutputStream(), true);
reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
} catch (IOException e) {
System.err.println("Couldn't get reading/writing channels to socket");
System.exit(1);
}
return true;
}
public static void main(String[] args) throws IOException {
String request = null; // Used to send request messages to server
String response = null;// Used to receive response messages from server
// Get reading channel from standard input (i.e., keyboard)
BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));
String command = "";
boolean connected = false;
while (command != null) {
System.out.print("> ");
command = keyboard.readLine();
if (command.equals("connect")) {
connected = connect(args[0], Integer.parseInt(args[1]));
request = "hello";
} else if (command.equals("disconnect")) {
// complete ...
connected = false;
} else if (command.equals("exit")) {
// complete ...
} else if (command.equals("balance")) {
// complete ...
} else if (command.startsWith("deposit")) {
// complete ...
} else if (command.startsWith("withdraw")) {
// complete ...
} else { // this is the case where the command entered is not valid
// complete ...
continue; // go back to the while loop. NOT to the if (connected) ...
}
// send request and read response (if we are connected)
if (connected == true) { // do the following only if connected
writer.println(request); // send the request prepared above
response = reader.readLine(); // receive the response to it.
System.out.println("\t"+response); // print out the response
}
}
// close keyboard channel
keyboard.close();
}
}the server code:
import java.net.*;
import java.io.*;
class Server{
public static void main(String[] args) {
int port = Integer.parseInt(args[0]);
ServerSocket server;
try {
server = new ServerSocket(Integer.parseInt(args[0]));
} catch (IOException ioe) {
System.err.println("Couldn't run server on port " + port);
return;
}
while(true) {
try {
Socket connection = server.accept();
ConnectionHandler handler = new ConnectionHandler(connection);
new Thread(handler).start();
} catch (IOException ioe) {
}
}
}
}the BankAccount Code:
import java.net.*;
import java.io.*;
class Server{
public static void main(String[] args) {
int port = Integer.parseInt(args[0]);
ServerSocket server;
try {
server = new ServerSocket(Integer.parseInt(args[0]));
} catch (IOException ioe) {
System.err.println("Couldn't run server on port " + port);
return;
}
while(true) {
try {
Socket connection = server.accept();
ConnectionHandler handler = new ConnectionHandler(connection);
new Thread(handler).start();
} catch (IOException ioe) {
}
}
}
}the ConnectionHandler code:
import java.net.*;
import java.io.*;
class ConnectionHandler implements Runnable {
// The connection with the client
private Socket conn = null;
PrintWriter writer = null;
BufferedReader reader = null;
String request = null;
String response = null;
BankAccount account = new BankAccount();
public ConnectionHandler(Socket conn) {
this.conn = conn;
}
public void run() {
try {
writer = new PrintWriter(conn.getOutputStream(), true);
reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String ipaddr = conn.getInetAddress().getHostName();
int port = conn.getPort();
System.out.println("Got connection from: " + ipaddr + ":" + port);
while ((request = reader.readLine()) != null) {
System.out.println(ipaddr + ":" + port + ": <-\t"+ request);
if (request.equals("hello")) {
response = "hello";
} else if (request.equals("balance")) {
response = Float.toString(account.balance());
// complete...
} else if (request.startsWith("deposit")) {
// startsWith(): http://java.sun.com/j2se/1.4.2/docs/...va.lang.String)
// split(): http://java.sun.com/j2se/1.4.2/docs/...va.lang.String)
// trim(): http://java.sun.com/j2se/1.4.2/docs/...ring.html#trim()
String amount = request.split(" ")[1].trim();
// floatValue(): http://java.sun.com/j2se/1.4.2/docs/...va.lang.String)
float f = Float.valueOf(amount).floatValue();
response = Float.toString(account.deposit(f));
} else if (request.startsWith("withdraw")) {
// complete ...
} else { // this is the case none of the above
// complete ...
}
writer.println(response);
System.out.println(ipaddr + ":" + port + ": ->\t"+ response);
}
} catch (IOException ioe) {
}
}
}