Setting an Icon for my Java Application

Question

I am in the middle of a code/application and I've gotten to the point where I am releasing it publicly. Id like to know a simple example code of how I can "set" the ICON image for the application. Just a simple code where I can place at the top of my class that will grab the Icon image out of its directory [/res/Icon.png]

Thanks <3

Answer 1

You can use Frame#setIconImage(Image) or if your want something that is a little more flexible, Window#setIconImages(List)

As demonstrated by

• Set Icon Image in Java
• How to add an image to a JFrame title bar?

Credit to those authors please

Updated with simple example

Loading images by it's nature can raise problems. You need to be prepared for the fact that it might fail. Hopefully, you've prepared the application well enough that under normal operations, this would be a rare situation

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Image;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class FrameIconTest {

    public static void main(String[] args) {
        new FrameIconTest();
    }

    public FrameIconTest() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Testing");

                try {
                    List<Image> icons = new ArrayList<Image>(5);
                    icons.add(ImageIO.read(getClass().getResource("/resources/FrameIcon16x16.png")));
                    icons.add(ImageIO.read(getClass().getResource("/resources/FrameIcon24x24.png")));
                    icons.add(ImageIO.read(getClass().getResource("/resources/FrameIcon32x32.png")));
                    icons.add(ImageIO.read(getClass().getResource("/resources/FrameIcon64x64.png")));
                    icons.add(ImageIO.read(getClass().getResource("/resources/FrameIcon128x128.png")));
                    frame.setIconImages(icons);
                } catch (IOException exp) {
                    exp.printStackTrace();
                    // Log the problem through your applications logger...
                }

                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new JLabel("Frame with icon"));
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

}