УП 2.1

1_src_countries.txt

Australia|Canberra
Belarus|Minsk
Belgium|Brussel
Brazil|Brasilia
Canada|Ottawa
Egypt|Cairo
Russia|Moskow
United Kingdom|London
United States|Washington

1_src_Main.java

public class Main {

    public static void main(String[] args) {
        View view = new View();
    }
}

1_src_View.java

import javax.swing.*;
import java.awt.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class View extends JFrame {
    private JList list;
    private Map<String, String> countries;

    public View() {
        super("Countries");
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            list = new JList();
            countries = new TreeMap<>();
            try (Scanner scanner = new Scanner(new File("src\\countries.txt"))) {
                scanner.useDelimiter("[|]|[\r\n]+");
                String country, capital;
                while (scanner.hasNext()) {
                    country = scanner.next();
                    capital = scanner.next();
                    countries.put(country, capital);
                }
            }
            //list.setListData(countries.entrySet().stream().map((Map.Entry<String, String> el) -> el.getKey() + " - " + el.getValue()).toArray());
            list.setListData(countries.entrySet().toArray());
            list.setCellRenderer(new ListRenderer());
            list.setFixedCellHeight(64);
            add(new JScrollPane(list));
            pack();
            setSize(450, 300);
            setLocationRelativeTo(null);
            setVisible(true);
        } catch (FileNotFoundException | ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e) {
            System.err.println(e.getMessage());
        }
    }
}

class ListRenderer extends DefaultListCellRenderer {
    private Font font;

    public ListRenderer() {
        font = new Font("Verdana", Font.PLAIN, 24);
    }

    @Override
    public Component getListCellRendererComponent(JList list, Object value, int index,
                                                  boolean isSelected, boolean cellHasFocus) {
        var valueEntry = (Map.Entry<String, String>) value;
        var valueString = valueEntry.getKey() + " - " + valueEntry.getValue();
        JLabel label = (JLabel) super.getListCellRendererComponent(
                list, valueString, index, isSelected, cellHasFocus);
        if (isSelected) {
            label.setIcon(new ImageIcon("src\\" + valueEntry.getKey() + ".png"));
        }
        label.setHorizontalTextPosition(JLabel.RIGHT);
        label.setFont(font);
        return label;
    }
}