Create a HistoryPanel class that extends JPanel. The constructor of HistoryPanel takes as argument a model object of type Library, which you need to store in some private instance variable.

Sure, here's an example implementation of the `HistoryPanel` class:

import javax.swing.*;
import java.util.List;

public class HistoryPanel extends JPanel {
    private final Library library;
    private final JTextArea textArea;

    public HistoryPanel(Library library) {
        this.library = library;

        // set layout and other properties of the panel
        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
        setBorder(BorderFactory.createTitledBorder("History"));

        // create text area to display history
        textArea = new JTextArea(20, 30);
        textArea.setEditable(false);

        // add text area to a scroll pane and add to the panel
        JScrollPane scrollPane = new JScrollPane(textArea);
        add(scrollPane);

        // display initial history
        updateHistory();
    }

    private void updateHistory() {
        List<Book> history = library.getHistory();
        StringBuilder sb = new StringBuilder();
        for (Book book : history) {
            sb.append(book.getTitle()).append(" by ").append(book.getAuthor()).append("\n");
        }
        textArea.setText(sb.toString());
    }
}

In this implementation, the `HistoryPanel` class extends `JPanel` and has two instance variables: `library` and `textArea`. The constructor takes a `Library` object as an argument, which is stored in the `library` instance variable. The `textArea` instance variable is a `JTextArea` used to display the history of checked-out books.

The `updateHistory()` method is called to update the text displayed in the `textArea`. It retrieves the list of checked-out books from the `library` object, formats the titles and authors of the books into a single string, and sets that string as the text of the `textArea`.

The `HistoryPanel` constructor also sets the layout of the panel, creates a titled border, adds the `textArea` to a scroll pane, and adds the scroll pane to the panel. Finally, it calls `updateHistory()` to display the initial history.