Thread: Trouble using Constructors and string to string() to print variables to GUI

Hey guys, I'm not new to programming but I am new to Java. Here is the layout of my program:

Introduction
The goal of this assignment is to familiarize you with writing a simple Java Graphical User Interface (GUI) application in Java to reinforce the object-oriented programming concepts discussed during lectures.

I'm having trouble implementing constructors and string to string to print to the GUI.
Any suggestions?

Procedures

1. *.java - Use an editor or Integrated Development Environment (IDE) to create the .java source code file.
2. Create a UI application to perform the following functions:
a. Create a class called Airline.java
i. Variables
1. airlineName
2. airlineHubLocation
ii. Methods
1. public getter/setter for all variables
2. public string toString() to print out the airline information
b. Create a class called Airport.java
i. Variables
1. airportName
2. airportCity
3. airportState
4. airportCode
ii. Methods
1. public getter/setter for all variables
2. constructor that takes four parameters for airportName, airportCity, airportState, airportCode
3. public string toString() to print out the airport information
c. Create a main class to run the application
i. Includes the “public static void main(String[] args) {}” function
ii. Creates an instance of Airport using the declared constructor; example Airport airport = new Airport(“Orlando International Airport”, “Orlando”, “Florida”, “MCO”);
iii. Create two instances of Airline; example Airline united = new Airline(); Airline delta = new Airline();
iv. Set the data attributes of each airline as follows:
1. united.setAirlineName(“United Airlines”);
2. united.setAirlineHubLocation(“MCO”);
3. delta.setAirlineName(“Delta Airlines”);
4. delta.setAirlineHubLocation(“ATL”);
v. Display the information about Orlando International Airport and its two airlines using the static method JOptionPane.showMessageDialog(null, string);
1. Using concatenation for the string parameter display
a. airport.toString() + “\n” + delta.toString() + “\n” + united.toString()
2. Output example

--- Update ---

Airline.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
 
package airline;
import javax.swing.JOptionPane;
/*
 *
 * 
 */
public class Airline {
    String airlineName;
    String airlineHubLocation;
//Methods
    public String getAirlineName() {
        return airlineName;
    }
 
    public String getAirlineHublocation() {
        return airlineHubLocation;
    }
 
    public void setAirlineName(String airlineName) {
        this.airlineName = airlineName;
    }
 
    public void setAirlineHubLocation(String airlineHublocation) {
        this.airlineHubLocation = airlineHublocation;
    }
 
    @Override
    public String toString() {
        return "Airline{" + "airlineName=" + airlineName + ", airlineHubLocation=" + airlineHubLocation + '}';
    }
 
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
 
    Airport airport = new Airport(); 
 
 
 
    Airline united = new Airline();
    united.setAirlineName("United Airlines");
    united.setAirlineHubLocation("MCO");
 
    Airline delta = new Airline();
    delta.setAirlineName("Delta Airlines");
    delta.setAirlineHubLocation("ATL");
 
 
    JOptionPane.showMessageDialog(null, "airport.toString() + delta.toString() + united.toString()");
 
 
    }
 
}

Airport.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
 
package airline;
 
/**
 *
 * 
 */
 
 
public class Airport {
    String airportName;
    String airportCity;
    String airportState;
    int airportCode;
 
 
 
    public String getAirportName() {
        return airportName;
    }
 
    public String getAirportCity() {
        return airportCity;
    }
 
    public String getAirportState() {
        return airportState;
    }
 
    public int getAirportCode() {
        return airportCode;
    }
 
    public void setAirportName(String airportName) {
        this.airportName = airportName;
    }
 
    public void setAirportCity(String airportCity) {
        this.airportCity = airportCity;
    }
 
    public void setAirportState(String airportState) {
        this.airportState = airportState;
    }
 
    public void setAirportCode(int airportCode) {
        this.airportCode = airportCode;
    }
 
 
 
 
 
 
 
 
}

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