I am building a simple Java server which simultaneously listens for client request on two ports simultaneously using two ServerSocket instances. Here is the code for Server:
import java.io.PrintWriter;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
class Socket1 implements Runnable
{
public void run()
{
try
{
ServerSocket serverSock=new ServerSocket(5000);
while(true)
{
Socket sock=serverSock.accept();
PrintWriter writer=new PrintWriter(sock.getOutputStream());
String text="Welcome to Port 5000";
writer.println(text);
}
}
catch(Exception e)
{
System.out.println("Error");
}
}
}
class Socket2 implements Runnable
{
public void run()
{
try
{
ServerSocket serverSock=new ServerSocket(3000);
while(true)
{
Socket sock=serverSock.accept();
PrintWriter writer=new PrintWriter(sock.getOutputStream());
String text="Welcome to Port 3000";
writer.println(text);
}
}
catch(Exception e)
{
System.out.println("Error");
}
}
}
public class Server
{
public static void main(String[] args)
{
Socket1 s1=new Socket1();
Socket2 s2=new Socket2();
Thread t1=new Thread(s1);
Thread t2=new Thread(s2);
t1.start();
t2.start();
}
}
Now code for Client1:
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.net.Socket;
public class Client1
{
public static void main(String[] args)
{
try
{
Socket s=new Socket("127.0.0.1", 5000);
InputStreamReader streamReader=new InputStreamReader(s.getInputStream());
BufferedReader reader=new BufferedReader(streamReader);
String text=reader.readLine();
System.out.println(text);
reader.close();
}
catch(Exception e)
{
System.out.println("Error");
}
}
}
Client2 contains the same code as Client1, the only difference being that it tries to connect to port 3000. Now, I execute Server.java first using command prompt. While the server blocks, I open two separate command prompts and execute Client1.java on one command prompt and Client2.java on the other command prompt. But, both clients go to blocking state and I get no output. Any idea how to solve this ?
