ProjectClient.java

import javax.swing.*;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.util.ArrayList;

/**
 * @author Abhiram Saran
 * @version 25 Jan 2020
 */

public class ProjectClient {

    private static Socket socket;
    private static ObjectOutputStream outputStream;
    private static ObjectInputStream inputStream;

    public static String hostnameInput() { //don't shout at me for using GUIs I tried my best okay

        return JOptionPane.showInputDialog(null, "Please enter a Hostname",
                "TITLE", JOptionPane.QUESTION_MESSAGE);
    }

    public void createOrganiser(){   //Enter name age yadayadayada

    }

    public void enterStaff() {   //use addStaff from Organiser parent class

    }

    public ArrayList<Staff> viewStaff() { //use arraylist above to show staff
         ArrayList<Staff> temp = new ArrayList<>();
        return temp;
                                    //incomplete

    }

    public static void main(String[] args) {  // may/may not have ripped this clean from the project 5 client

        String host;
        try {
            host = hostnameInput();
        } catch (NullPointerException e) {
            JOptionPane.showMessageDialog(null, "Enter valid Hostname!",
                    "Invalid Hostname", JOptionPane.ERROR_MESSAGE);
            return;
        }
        System.out.println(host);

        int port = 0;
        boolean validPort = false;
        while (!validPort) {

            String portString = "";
            try {
                portString = JOptionPane.showInputDialog(null, "Please enter a Port Number",
                        "TITLE", JOptionPane.QUESTION_MESSAGE);
            } catch (NullPointerException e) {
                JOptionPane.showMessageDialog(null, "Enter a valid Port Number!",
                        "Invalid Port Number", JOptionPane.ERROR_MESSAGE);
                return;
            }
            int characterCounter = 0;
            for (int i = 0; i < portString.length(); i++) {

                if (!Character.isDigit(portString.charAt(i))) {
                    characterCounter++;
                }
            }

            if (characterCounter > 0) {
                JOptionPane.showMessageDialog(null, "Enter a valid Port Number!",
                        "Invalid Port Number", JOptionPane.ERROR_MESSAGE);
            }

            if (characterCounter == 0) {
                port = Integer.parseInt(portString);
                validPort = true;
            }
        }

        System.out.println(port);

        try {
            socket = new Socket(host, port);

            outputStream = new ObjectOutputStream(socket.getOutputStream());
            inputStream = new ObjectInputStream(socket.getInputStream());

        } catch (IOException e) {
            e.printStackTrace();
        }


    }

    private static boolean isParsable(String string) { //trash
        return string.chars()
                .mapToObj(Character::isDigit)
                .reduce(Boolean::logicalAnd)
                .orElse(Boolean.FALSE);
    }

}