Question

I have currently a functional Java progam with a gui. Its a simple table of contacts with 3 buttons: add, remove, and edit. Right now the buttons are in the program but they do not work yet. I need the buttons to actually be able to add, remove, or edit things on the table. Thanks so much.

Here is the working code so far:

//PersonTableModel.java
import java.util.List;
import javax.swing.table.AbstractTableModel;
public class PersonTableModel extends AbstractTableModel
{
    private static final int COLUMN_FIRSTNAME = 0;
    private static final int COLUMN_MIDDLENAME = 1;
    private static final int COLUMN_LASTNAME = 2;
    private static final int COLUMN_JOB = 3;
    private String[] columnNames = {"First Name", "Middle Name", "Last Name", "JOB" };
    private List<Person> listPersons;

    public PersonTableModel(List<Person> listPersons){
        this.listPersons = listPersons;
    }
    @Override
    public int getColumnCount() {
        return columnNames.length;
    }

    @Override
    public int getRowCount() {
        return listPersons.size();
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        Person person = listPersons.get(rowIndex);
        Object returnValue = null;
        switch(columnIndex){
            case COLUMN_FIRSTNAME:
                returnValue = person.getFirstName();
                break;
            case COLUMN_MIDDLENAME:
                returnValue = person.getMiddleName();
                break;
            case COLUMN_LASTNAME:
                returnValue = person.getLastName();
                break;
            case COLUMN_JOB:
                returnValue = person.getJob();
                break;
            default:
                throw new IllegalArgumentException("Invalid column index");
        }
        return returnValue;
    }
    @Override
    public String getColumnName(int columnIndex) {
        return columnNames[columnIndex];
    }
}

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//Person.java
public class Person {
   public String getFirstName() {
       return firstName;
   }
   public void setFirstName(String firstName) {
       this.firstName = firstName;
   }
   public String getMiddleName() {
       return middleName;
   }
   public void setMiddleName(String middleName) {
       this.middleName = middleName;
   }
   public String getLastName() {
       return lastName;
   }
   public void setLastName(String lastName) {
       this.lastName = lastName;
   }
   public String getJob() {
       return job;
   }
   public void setJob(String job) {
       this.job = job;
   }
   private String firstName;
   private String middleName;
   private String lastName;
   private String job;

   public Person(String firstName, String middleName, String lastName, String job){
       this.firstName = firstName;
       this.middleName = middleName;
       this.lastName = lastName;
       this.job = job;
   }
}

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//TableGUI.java
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
public class TableGUI extends JFrame
{
  
  
   //Create PersonTableModel variable  
   PersonTableModel prm;  
   //Create JTable variable
   JTable table;
  
   //Create two panel variables
   JPanel tablePanel;
   JPanel buttonPanel;
  
   //Declare three button variables
   JButton addButton;
   JButton editButton;
   JButton exitButton;
  
   public TableGUI(List<Person>list)
   {
      
       //set layour as borderlayout
       setLayout(new BorderLayout());
       //Craete an instance of PersonTableModel
       prm=new PersonTableModel(list);
       //Create an intance of JTable and set PersonTableModel as its object
       table=new JTable(prm);
      
      
       tablePanel=new JPanel();
       tablePanel.add(table);
      
       //Add tablePanel
       add(tablePanel, BorderLayout.NORTH);
      
       buttonPanel=new JPanel();
       buttonPanel.setLayout(new FlowLayout());
       addButton=new JButton("Add");
       addButton.addActionListener(new ActionListener() {
          
           @Override
           public void actionPerformed(ActionEvent arg0) {
              
               System.out.println("Not implemented");
              
           }
       });
       buttonPanel.add(addButton);
      
       editButton=new JButton("Edit");
       buttonPanel.add(editButton);
       editButton.addActionListener(new ActionListener() {
          
           @Override
           public void actionPerformed(ActionEvent e) {
               System.out.println("Not implemented");
              
           }
       });
      
       exitButton=new JButton("Exit");
       buttonPanel.add(exitButton);
       exitButton.addActionListener(new ActionListener() {
          
           @Override
           public void actionPerformed(ActionEvent e) {
               System.out.println("Not implemented");
              
           }
       });
      
       //Add buttonPanel
       add(buttonPanel, BorderLayout.CENTER);  
       pack();
   }
  
  
  
}

--------------------------------------------------------------------------------------------------------------------------------------------

/**The driver program that displays jTable with
* three buttons to add, edit and exit . The buttons
* are not implemented.
* */
//PersonDriver.java
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
public class PersonDriver extends JFrame
{
   public static void main(String[] args)
   {
      
       //Create a ArrayList object
       List<Person>arrayList=new ArrayList<Person>();
       //Add rows to the arrayList
       arrayList.add(new Person("FirstName", "MiddleName", "LastName", "Job"));
       arrayList.add(new Person("f1", "m1", "l2", "j3"));
       arrayList.add(new Person("f5", "m4", "l3", "j1"));
       arrayList.add(new Person("f3", "m3", "l5", "j2"));
       arrayList.add(new Person("f1", "m2", "l4", "j5"));
       arrayList.add(new Person("f4", "m5", "l1", "j4"));
      
       //Create an JFrame object
       JFrame tableFrame=new TableGUI(arrayList);
       //Set title
       tableFrame.setTitle("JTableExample");
       //Set visible true
       tableFrame.setVisible(true);
      
   }
}

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JTableExample FirstName MiddleName LastName Johb m1 m4 m3 m2 m5 j3 j5 Add Edit Exit