How to add image to jlist

Question

Hi, I created an aj list, and there I want to add an image before any text in this text, how can I do this, but I could not achieve my goal. I want to add an image before the "Barmer" list item.

    public class ListDemo extends JPanel
                          implements ListSelectionListener {
        private JList list;
        private DefaultListModel listModel;


        public ListDemo() {
            super(new BorderLayout());

            listModel = new DefaultListModel();
            listModel.addElement("Barmer");
           //Create the list and put it in a scroll pane.
            list = new JList(listModel);
            list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
            list.setSelectedIndex(0);
            list.addListSelectionListener(this);
            list.setVisibleRowCount(5);
            list.setBackground(new java.awt.Color(0,191,255));;
           list.setFont(new Font("Arial",Font.BOLD,35));
            list.setForeground( Color.white );
            list.setFixedCellHeight(60);
    list.setFixedCellWidth(50);
    list.setBorder(new EmptyBorder(10,20, 20, 20));


            JScrollPane listScrollPane = new JScrollPane(list);
            add(listScrollPane, BorderLayout.CENTER);

        }
         public void valueChanged(ListSelectionEvent e) {

        }

        private static void createAndShowGUI() {
            //Create and set up the window.
            JFrame frame = new JFrame("ListDemo");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            //Create and set up the content pane.
            JComponent newContentPane = new ListDemo();
            newContentPane.setOpaque(true); //content panes must be opaque
            frame.setContentPane(newContentPane);
           frame.setExtendedState(JFrame.MAXIMIZED_BOTH); 
    frame.setUndecorated(true);

            //Display the window.
            frame.pack();
            frame.setVisible(true);
        }



          public static void main(String[] args) {

                    createAndShowGUI();

        }
    }

How can I help this?

Thanks in advance

Answer 1

ListCellRenderer. JComboBox. a JList. . JLabel implements ListCellRender, , , am.

extends DefaultListCellRender JLabel , , Font ImageIcon. -

public class MarioListRenderer extends DefaultListCellRenderer {

    Font font = new Font("helvitica", Font.BOLD, 24);

    @Override
    public Component getListCellRendererComponent(
            JList list, Object value, int index,
            boolean isSelected, boolean cellHasFocus) {

        JLabel label = (JLabel) super.getListCellRendererComponent(
                list, value, index, isSelected, cellHasFocus);
        label.setIcon(imageMap.get((String) value));
        label.setHorizontalTextPosition(JLabel.RIGHT);
        label.setFont(font);
        return label;
    }
}

, , getListCellRendererComponent. value, , , , . ImageIcon Icon JLabel renderer.

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.util.HashMap;
import java.util.Map;
import javax.swing.DefaultListCellRenderer;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class MarioList {

    private final Map<String, ImageIcon> imageMap;

    public MarioList() {
        String[] nameList = {"Mario", "Luigi", "Bowser", "Koopa", "Princess"};
        imageMap = createImageMap(nameList);
        JList list = new JList(nameList);
        list.setCellRenderer(new MarioListRenderer());

        JScrollPane scroll = new JScrollPane(list);
        scroll.setPreferredSize(new Dimension(300, 400));

        JFrame frame = new JFrame();
        frame.add(scroll);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public class MarioListRenderer extends DefaultListCellRenderer {

        Font font = new Font("helvitica", Font.BOLD, 24);

        @Override
        public Component getListCellRendererComponent(
                JList list, Object value, int index,
                boolean isSelected, boolean cellHasFocus) {

            JLabel label = (JLabel) super.getListCellRendererComponent(
                    list, value, index, isSelected, cellHasFocus);
            label.setIcon(imageMap.get((String) value));
            label.setHorizontalTextPosition(JLabel.RIGHT);
            label.setFont(font);
            return label;
        }
    }

    private Map<String, ImageIcon> createImageMap(String[] list) {
        Map<String, ImageIcon> map = new HashMap<>();
        for (String s : list) {
            map.put(s, new ImageIcon(
                    getClass().getResource("/marioscaled/" + s + ".png")));
        }
        return map;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new MarioList();
            }
        });
    }
}

---

• AndrewThompson . , . Swing . " Swing" .

• Swing Thread Dispatch Thread (EDT). , creatAndShowGui() SwinUtilities.invokeLater.... .

---

UPDATE .

import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.swing.DefaultListCellRenderer;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class MarioList {

    private final Map<String, ImageIcon> imageMap;

    public MarioList() {
        String[] nameList = {"Mario", "Luigi", "Bowser", "Koopa", "Princess"};
        imageMap = createImageMap(nameList);
        JList list = new JList(nameList);
        list.setCellRenderer(new MarioListRenderer());

        JScrollPane scroll = new JScrollPane(list);
        scroll.setPreferredSize(new Dimension(300, 400));

        JFrame frame = new JFrame();
        frame.add(scroll);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public class MarioListRenderer extends DefaultListCellRenderer {

        Font font = new Font("helvitica", Font.BOLD, 24);

        @Override
        public Component getListCellRendererComponent(
                JList list, Object value, int index,
                boolean isSelected, boolean cellHasFocus) {

            JLabel label = (JLabel) super.getListCellRendererComponent(
                    list, value, index, isSelected, cellHasFocus);
            label.setIcon(imageMap.get((String) value));
            label.setHorizontalTextPosition(JLabel.RIGHT);
            label.setFont(font);
            return label;
        }
    }

    private Map<String, ImageIcon> createImageMap(String[] list) {
        Map<String, ImageIcon> map = new HashMap<>();
        try {
            map.put("Mario", new ImageIcon(new URL("http://i.stack.imgur.com/NCsHu.png")));
            map.put("Luigi", new ImageIcon(new URL("http://i.stack.imgur.com/UvHN4.png")));
            map.put("Bowser", new ImageIcon(new URL("http://i.stack.imgur.com/s89ON.png")));
            map.put("Koopa", new ImageIcon(new URL("http://i.stack.imgur.com/QEK2o.png")));
            map.put("Princess", new ImageIcon(new URL("http://i.stack.imgur.com/f4T4l.png")));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return map;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new MarioList();
            }
        });
    }
}