Is it a port problem?
Hi Folks!
I am new in java and working on a client server application. I am running server on port 5000. After that client connects to server on this port. Now after client connects I want to send 2 numbers to client to process. In my code I on server I am not able to send those 2 numbers to client. I am pretty sure something is wrong with the client constructor. HOW WILL I KNOW WHAT IS CLIENT PORT NUMBER IN ORDER TO CONNECT TO IT THROUGHT MY SERVER? If this is not the problem then what I am suppose to do?
Here is my code to give you guys a bit idea
SERVER CLASS
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.StringTokenizer;
publicclass MathServer2extends Thread{
ServerSocket hi;
Socket client;
//for server
DataInputStream sbr;
DataOutputStream sdos;
//for client
DataInputStream br;
DataOutputStream dos;
int counter;
int x=33554393,i;
Integer a1,b1;
Stack st =new Stack();
publicstaticvoid main(String argv[])throws Exception{
new MathServer2();
}
public MathServer2()throws Exception{
hi =new ServerSocket(5000);
System.out.println("Server Listening on port 5000....");
this.start();
}
publicvoid run(){
System.out.println("Run start here...");
while(true){
try{
Socket client = hi.accept();
Connect c =new Connect(client);
System.out.println("Client is connected");
}catch(Exception e){}
}
}
}
class Connectextends Thread{
DataInputStream sbr;
DataOutputStream sdos;
Socket cs;
DataInputStream br;
DataOutputStream dos;
int x=33554393,i;
Integer a1,b1;
Stack st =new Stack();
public Connect(){}
public Connect(Socket s){
cs = s;
try{
br =new DataInputStream(cs.getInputStream());
dos =new DataOutputStream(cs.getOutputStream());
}catch(Exception e1){
try{
cs.close();
}catch(Exception e){System.out.println("EXCEPTION IN CLIENT. CLIENT CANNOT CONNECT...");}
return;
}
this.start();
}
publiclong add(long a,long b){
return a+b;
}
publicvoid run(){
try{
for(i=0;i<=x;i++)
{
if((x==0))
{
break;
}
else
x=x/10;
st.push(new Integer (x));
}
System.out.println("this is the fresh Stack..."+st);
if(st.empty() ==true)
{
// throw new EmptyStackException ( ) ;
System.out.println("Stack is empty..");
}
else
{
a1 = (Integer)st.pop();
b1 = (Integer)st.pop();
}
System.out.println("New Stack..."+st);
//sending 2 numbers to client.
cs =new Socket("herzing-g2eui8a", 3587);
System.out.println("testing 1...........");
sbr =new DataInputStream(cs.getInputStream());
sdos =new DataOutputStream(cs.getOutputStream());
System.out.println("testing 2...........");
long x,y;
x=a1.longValue();
sdos.writeLong(x);
System.out.println("testing 3...........");
dos.flush();
System.out.println("testing 4...........");
System.out.println("Server send client 1st # "+x);
y=b1.longValue();
sdos.writeLong(y);
sdos.flush();
System.out.println("Server send client 2nd# "+y);
System.out.println("I send 2 numbers "+x+" & "+y+" to client: "+cs+" for process");
//get answer back from client
String str = br.readLine();
System.out.println("I got it from clien: "+str);
long x1 = br.readLong();
System.out.println("I got: "+x1);
long y1 = br.readLong();
System.out.println("I got: "+y1);
Connect cc =new Connect();
long ans = cc.add(x1,y1);
Thread.currentThread().sleep (1000);
System.out.println("I am sending the answer..."+ans);
dos.writeBytes("The sum is: "+ans);
br.close();
dos.close();
cs.close();
}catch(Exception e){}
}
}
CLIENT CLASS
import java.io.*;
import java.net.*;
publicclass MathClient2{
publicstaticvoid main(String argv[])throws Exception{
Socket echo;
DataInputStream br;
DataOutputStream dos;
echo =new Socket("127.0.0.1", 5000);
br =new DataInputStream(echo.getInputStream());
dos =new DataOutputStream(echo.getOutputStream());
// int x = 5, y = 5;
long x = br.readLong();
dos.writeLong(x);
dos.flush();
System.out.println("Client send first number "+x);
long y=br.readLong();
dos.writeLong(y);
dos.flush();
System.out.println("Client send second number "+x);
//String str = br.readLine();
//System.out.println("Client Side.. I got: "+str);
}
}
Thanks a lot in advance
