MyProgramA_multiple.java

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;

class MyProgramA {
    private int port=8000;
    private ServerSocket server;
    private List<ConnectionThread> connection = new ArrayList<ConnectionThread>();

    public MyProgramA() throws Exception
    {
        server = new ServerSocket(port);
        while (true) {
            Socket socket = server.accept();
            ConnectionThread connectionThread = new ConnectionThread(socket);
            connectionThread.start();
            this.connection.add(connectionThread);
		}
    }
    
    public class ConnectionThread extends Thread {
    	private Socket socket;
    	private DataInputStream in;
    	private DataOutputStream out;
    	
    	public ConnectionThread(Socket connectionToClient) {
    		this.socket = connectionToClient;
    		this.in = new DataInputStream(this.socket.getInputStream());
    		this.out = new DataOutputStream(this.socket.getOutputStream());
		}
    	public void run() {
			System.out.println(in.readDouble());
			out.writeDouble(30.00);
		}
    }
}