Hello all together
I'm currently trying to get a network game going.
I'm using Sockets and Objekt Serialization, because thats what we are doing in class and I need to use them later in exams.
After alot of working and trying out, I got the Server to send an Object and the Client to recieve it.
But for some miraculous reason, it will send the Object and recieve it, but will not update it.
So its something client sided. Because the server only recieves the old object.
So it will send the Player Object: with x 100 and y 100. Eventhough I updated it on the client side to eg x 140 and y 132
Oh and when your checking it, maybe someone could tell me why I get two connections when connecting to the server?
Thanks alot
Heres the code:
Server:
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| import java.io.*;
import java.net.*;
public class Server extends Thread {
private ServerSocket arrayServer;
public static void main(String argv[]) throws Exception {
new Server();
}
public Server() throws Exception {
arrayServer = new ServerSocket(9999);
System.out.println("Server listening on port 4000.");
this.start();
}
public void run() {
while(true) {
try {
System.out.println("Waiting for connections.");
Socket client = arrayServer.accept();
System.out.println("Accepted a connection from: "+
client.getInetAddress());
Connect c = new Connect(client);
} catch(Exception e) {}
}
}
}
class Connect extends Thread {
private Socket client = null;
private ObjectInputStream ois = null;
private ObjectOutputStream oos = null;
public Connect() {}
public Connect(Socket clientSocket) {
client = clientSocket;
try {
ois = new ObjectInputStream(client.getInputStream());
oos = new ObjectOutputStream(client.getOutputStream());
} catch(Exception e1) {
try {
client.close();
}catch(Exception e) {
System.out.println(e.getMessage());
}
return;
}
this.start();
}
public void run() {
while (true) {
Object obj = null;
try {
obj = ois.readObject();
System.out.println((Player)obj);
if (obj instanceof Player) {
oos.writeObject((Player)obj);
}
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
} |
Client (with Slick2D):
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| import java.awt.Point;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.ArrayList;
import org.newdawn.slick.Color;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.Image;
import org.newdawn.slick.Input;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.Sound;
import org.newdawn.slick.geom.Circle;
import org.newdawn.slick.geom.Rectangle;
import org.newdawn.slick.particles.ConfigurableEmitter;
import org.newdawn.slick.particles.ParticleEmitter;
import org.newdawn.slick.particles.ParticleIO;
import org.newdawn.slick.particles.ParticleSystem;
import org.newdawn.slick.particles.effects.FireEmitter;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;
public class GameplayState extends BasicGameState {
int stateID = -1;
GameplayState( int stateID )
{
this.stateID = stateID;
}
@Override
public int getID() {
return stateID;
}
GameClient client = null;
Player me;
ArrayList<Player> players = new ArrayList<Player>();
String debugStr = "";
public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
client = new GameClient();
me = new Player(0,100,100);
me.nick = "ad";
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
for (Player p: players) {
g.drawRect(p.x, p.y, p.width, p.height);
}
g.drawString(debugStr, 10, 20);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
Input input = gc.getInput();
if (input.isKeyDown(input.KEY_W)) {
me.moveUp();
}
if (input.isKeyDown(input.KEY_S)) {
me.moveDown();
}
if (input.isKeyDown(input.KEY_A)) {
me.moveLeft();
}
if (input.isKeyDown(input.KEY_D)) {
me.moveRight();
}
debugStr = me.toString();
client.sendTCP(me);
}
public class GameClient {
private String host;
private int port;
private ReaderThread reader;
private Socket socket;
ObjectOutputStream oos = null;
ObjectInputStream ois = null;
public GameClient(){
starteClient("127.0.0.1",9999);
}
public boolean starteClient(String host, int port){
try {
socket = new Socket(host, port);
this.host= host;
this.port= port;
oos = new ObjectOutputStream(socket.getOutputStream());
ois = new ObjectInputStream(socket.getInputStream());
reader = new ReaderThread();
reader.start();
return true;
}
catch (IOException e){
System.err.println(e);
return false;
}
}
public void sendTCP(Object o){
try {
oos.writeObject(o);
} catch (IOException ex) {
}
}
class ReaderThread extends Thread {
public void run(){
while (true) {
try {
Player obj = (Player)ois.readObject();
boolean b = false;
int i = 0;
for (Player p: players) {
if (p == obj) {
b = true;
players.set(i, obj);
}
i++;
}
if (!b) {
players.add(obj);
System.out.println("Recieved New Player");
}
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
}
public void beendeClient() {
try {
oos.close();
ois.close();
socket.close();
}
catch (IOException e){
System.err.println(e);
}
}
}
} |
And the Player Class:
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| import java.awt.Rectangle;
import java.io.Serializable;
public class Player implements Serializable {
int id;
String nick;
float x,y;
double aimAngle;
int width = 50, height = 50;
Rectangle r;
public Player(int id, float x, float y) {
this.id = id;
this.x = x;
this.y = y;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getNick() {
return nick;
}
public void setNick(String nick) {
this.nick = nick;
}
public float getX() {
return x;
}
public void setX(float x) {
this.x = x;
}
public float getY() {
return y;
}
public void setY(float y) {
this.y = y;
}
public double getAimAngle() {
return aimAngle;
}
public void setAimAngle(double aimAngle) {
this.aimAngle = aimAngle;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
public void moveUp() {
y -= 1;
}
public void moveDown() {
y += 1;
}
public void moveLeft() {
x -= 1;
}
public void moveRight() {
x += 1;
}
public Rectangle getRect() {
return new Rectangle((int)x,(int)y,width,height);
}
public String toString() {
return this.nick +";"+ this.x +";"+ this.y +";"+ this.aimAngle +";"+ this.width +";"+ this.height +";"+ this.id;
}
} |
