code

package oop.basic;

import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import java.util.Observable;
import java.util.Observer;

/**
 * @author Arjen
 * @date 21/05/16
 */
public class Display extends JFrame implements Observer{
    private Library lib;
    private JPanel buttons1Panel;
    private JPanel listsPanel;
    private JPanel buttons2Panel;

    private JButton newMemButton;
    private JButton newBookButton;
    private JButton reportButton;
    private JButton rentButton;
    private JButton returnButton;
    private JButton saveButton;
    private JButton restoreButton;
    private JList<Member> memberJList;
    private List<Book> freeBookList;
    private JList<Book> freeBookJList;
    private List<Book> rentedBookList;
    private JList<Book> rentedBookJList;


    public Display(Library lib) {
        this.lib = lib;

        //Initializing the frame and layout of display
        buttons1Panel = new JPanel();
        listsPanel = new JPanel();
        buttons2Panel = new JPanel();
        setTitle("DatBoi Library");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(buttons1Panel, BorderLayout.NORTH);
        add(listsPanel, BorderLayout.CENTER);
        add(buttons2Panel, BorderLayout.SOUTH);


        //Initializing all the Action objects (in this case all buttons)
        //TODO: Icon still shows up, find way to remove?
        newMemButton = new JButton("New Member");
        newMemButton.setToolTipText("Add a new member to the library list");
        newMemButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JTextField memberName = new JTextField();
                JTextField memberAddress = new JTextField();
                JPanel panel = new JPanel(new GridLayout(0, 1));
                panel.add(new JLabel("Member name:"));
                panel.add(memberName);
                panel.add(new JLabel("Member address:"));
                panel.add(memberAddress);
                int result = JOptionPane.showConfirmDialog(null, panel, "Add new member",
                        JOptionPane.OK_CANCEL_OPTION);
                if (result == JOptionPane.OK_OPTION) {
                    Display.this.lib.addNewMember(memberAddress.getText(), memberName.getText());
                }
            }
        });

        newBookButton = new JButton("New Book");
        newBookButton.setToolTipText("Add a new book to the library list");
        newBookButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JTextField bookName = new JTextField();
                JTextField bookAuthors = new JTextField();
                JPanel panel = new JPanel(new GridLayout(0, 1));
                panel.add(new JLabel("Book Name:"));
                panel.add(bookName);
                panel.add(new JLabel("Book Authors, separated only by comma's:"));
                panel.add(bookAuthors);
                int result = JOptionPane.showConfirmDialog(null, panel, "Add new book",
                        JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null);
                if (result == JOptionPane.OK_OPTION) {
                    String []authors = bookAuthors.getText().split("\\.");
                    Display.this.lib.addNewBook(bookName.getText(), authors);
                }
            }
        });

        reportButton = new JButton("Report");
        reportButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {

            }
        });

        rentButton = new JButton("Rent");
        rentButton.setToolTipText("Rent out the selected free book to the selected person");
        rentButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {

            }
        });

        returnButton = new JButton("Return");
        returnButton.setToolTipText("Return the selected book");
        returnButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {

            }
        });

        saveButton = new JButton("Save");
        saveButton.setToolTipText("Save current state of library");
        saveButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {

            }
        });

        restoreButton = new JButton("Restore");
        restoreButton.setToolTipText("Restore library to a saved state");
        restoreButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {

            }
        });

        //Initializing list information
        freeBookList = new ArrayList<>();
        rentedBookList = new ArrayList<>();
        updateBookLists();

        memberJList = new JList<>();
        memberJList.setListData(lib.getMemberList().toArray(new Member[lib.getMemberList().size()]));
        memberJList.addListSelectionListener(new ListSelectionListener() {
            @Override
            public void valueChanged(ListSelectionEvent e) {
                if (!e.getValueIsAdjusting()) {
                    String memberName = ((Member) ((JList) e.getSource()).getSelectedValue()).getName();
                    List<Book> rentedBooksByMember = new ArrayList<>();
                    for (Book b : rentedBookList) {
                        if (b.getLastRentData().getMemberData().getName() == memberName) {
                            rentedBooksByMember.add(b);
                        }
                    }
                    Display.this.rentedBookJList.setListData(rentedBooksByMember.toArray(new Book[rentedBookList.size()]));
                }
            }
        });
        JScrollPane memberScrollPane = new JScrollPane(memberJList);
        freeBookJList = new JList<>();
        freeBookJList.setListData(freeBookList.toArray(new Book[freeBookList.size()]));
        JScrollPane freeBookScrollPane = new JScrollPane(freeBookJList);
        rentedBookJList = new JList<>();
        rentedBookJList.setListData(rentedBookList.toArray(new Book[rentedBookList.size()]));
        JScrollPane rentedBookScrollPane = new JScrollPane(rentedBookJList);


        //Adding all components to the JPanels
        buttons1Panel.add(newMemButton);
        buttons1Panel.add(newBookButton);
        buttons1Panel.add(reportButton);
        buttons1Panel.add(rentButton);
        buttons1Panel.add(returnButton);
        buttons2Panel.add(saveButton);
        buttons2Panel.add(restoreButton);
        listsPanel.add(memberScrollPane);
        listsPanel.add(freeBookScrollPane);
        listsPanel.add(rentedBookScrollPane);


    }

    @Override
    public void update(Observable o, Object arg) {
        if (o.equals(lib)) {
            System.out.println("Display detected update");
            memberJList.setListData(lib.getMemberList().toArray(new Member[lib.getMemberList().size()]));
            freeBookList.clear();
            rentedBookList.clear();
            updateBookLists();
            freeBookJList.setListData(freeBookList.toArray(new Book[freeBookList.size()]));
            rentedBookJList.setListData(rentedBookList.toArray(new Book[rentedBookList.size()]));
            listsPanel.revalidate();
            listsPanel.repaint();
        }
    }

    public void updateBookLists() {
        for (Book b: this.lib.getBookList()) {
            if (b.isRented()) {
                rentedBookList.add(b);
            } else {
                freeBookList.add(b);
            }
        }
    }
}