ImageIcon Problem

[Dennis Putnam]

I'm trying to create a JLabel that contains an image but it will not display. From examples I found, here is what I came up with for the JLabel definition.

URL logoURL=getClass().getResource("img/KCBSLogo.jpg");
JLabel Logo;
ImageIcon img=new ImageIcon(logoURL);
System.out.println(img.getDescription());
if (logoURL!=null) {
	Logo = new JLabel(img);
}
else {
	Logo = new JLabel("KCBS Logo");
}
Logo.setBounds(188, 87, 132, 142);
Logo.setHorizontalAlignment(SwingConstants.CENTER);
Logo.setVerticalAlignment(SwingConstants.CENTER);
frmKcbsEventsSearch.getContentPane().add(Logo);

Since I do not get the text "KCBS Logo" I must be getting a non-null for logoURL. When I print imageIcon description I get:

file:/H:/html/Applets/KCBSEvents/bin/KCBSEvents/img/KCBSLogo.jpg

If this is supposed to be a true URL then it is invalid and should be:

file:///H:/html/Applets/KCBSEvents/bin/KCBSEvents/img/KCBSLogo.jpg

The path is correct and I can plug the second URL into my browser and see the image. The first produces an error in the browser. So what am I doing wrong? TIA.

[Michael Dunn]

import java.awt.*;
import java.applet.Applet;
import javax.swing.*;
public class TestApplet extends JApplet
{
  public Image img;
  public void init()
  {
    try
    {
      img = getImage(new java.net.URL(getCodeBase(),"test.gif"));
    }
    catch(Exception e){}
    add(new JLabel(new ImageIcon(img)));
  }
}

[Dennis Putnam]

Thanks for the reply. That is completely differ than what I'm doing, obviously. I'll give it a try.

[Dennis Putnam]

Ran into one small problem. What is getImage? I can't seem to resolve it.

Is this part of the Applet class? What if I am not creating an applet?

[Dennis Putnam]

I answered my question myself by trying it. While building a standalone program it apparently doesn't matter if I use a JApplet class for this issue. Anyway, it didn't help, as I still have the same problem. However, it did prove what I already knew, it cannot find the file. I am guessing that the crux of the problem is that I am not specifying the path correctly. The 'img' sub-directory is in the same directory as the .java files containing all the classes. I even tried moving the image file to the same directory and referencing it without the 'img/' to no avail. Where is the darn thing supposed to be relative to the class definition? TIA.

[Michael Dunn]

I just tried my posted code, changing
new java.net.URL(getCodeBase(),"test.gif")
to
new java.net.URL(getCodeBase(),"img/test.gif")

and the image displayed fine.

One of the problems I have found with applets is the way they cache the class files.
compile the class, find something's not right, make a change, recompile/rerun, and the
original class file is used.

Create another folder, put the .java, .html and .jpg files there.
Copy the code I posted into the .java file (changing the name of the image file),
then compile and run the html file.

[Dennis Putnam]

Thanks but I found using your Applet method opens a default Applet window which I don't want. I couldn't get that to work either in any case. It kept throwing an InstantiationException. The main problem at this point is that I don't know how to generate a useful error message explaining why the file is not found or loaded. I even tried an absolute path as suggested in another example. That example was quite simple and had me do this:

JLabel Logo;
try {
	ImageIcon logo=new ImageIcon("H:\\html\\Applets\\KCBSEvents\\src\\KCBSEvents\\KCBSLogo.jpg");
	Logo = new JLabel(logo);
}
catch (Exception e) {
	Logo = new JLabel("KCBS Logo");
}
Logo.setBounds(188, 87, 132, 142);
Logo.setHorizontalAlignment(SwingConstants.CENTER);
Logo.setVerticalAlignment(SwingConstants.CENTER);
frmKcbsEventsSearch.getContentPane().add(Logo);

There is no exception thrown so something legitimate is being put into 'logo' but whatever it is, is not being displayed in the JLabel.

[Michael Dunn]

> Thanks but I found using your Applet method opens a default Applet window which I don't want.

I may have led you astray. In your first post I saw this
file:/H:/html/Applets/.....

and assumed you were trying to display an image in an applet, so I posted the applet example with getCodeBase()

Probably best now to post a compilable/runnable example, so we can run it and see if it works for us (or not).
not a lot of code, just enough to display an image in a JLabel in a JFrame or whatever container you're using

[Dennis Putnam]

Thanks for the help. I started out writing a couple of simple applets and then started on this standalone program. I didn't bother to change the directory and just started a new project in the same one. Thats why it wound up with that directory in the path.

Anyway, I'm trying to produce a splash screen and the class definition is not that big so this should give you enough.

public class SplashScreen {
	
	private JFrame frmKcbsEventsSearch;
	private static CountDownLatch signal;
	
	
	public SplashScreen() {
		initialize();
	}
	public static void setLatch(CountDownLatch lock) {
		signal=lock;
	}
	public static void ShowWindow() {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					SplashScreen window = new SplashScreen();
					window.frmKcbsEventsSearch.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
	public void initialize() {
		frmKcbsEventsSearch=new JFrame();
		frmKcbsEventsSearch.getContentPane().setBounds(new Rectangle(200, 200, 520, 450));
		frmKcbsEventsSearch.getContentPane().setFont(new Font("Times New Roman", Font.PLAIN, 12));
		frmKcbsEventsSearch.setTitle("KCBS Events Search");
		frmKcbsEventsSearch.setBounds(200,200,520,450);
		frmKcbsEventsSearch.getContentPane().setLayout(null);
		
		JLabel lblCopyrightBy = new JLabel("Some text");
		lblCopyrightBy.setBounds(5, 0, 503, 66);
		lblCopyrightBy.setFont(new Font("Times New Roman", Font.PLAIN, 24));
		lblCopyrightBy.setHorizontalAlignment(SwingConstants.CENTER);
		frmKcbsEventsSearch.getContentPane().add(lblCopyrightBy);
		
		JLabel Logo;
		try {
			ImageIcon logo=new ImageIcon("H:\\html\\Applets\\KCBSEvents\\src\\KCBSEvents\\KCBSLogo.jpg");
			Logo = new JLabel(logo);
		}
		catch (Exception e) {
			Logo = new JLabel("KCBS Logo");
		}
		Logo.setBounds(188, 87, 132, 142);
		Logo.setHorizontalAlignment(SwingConstants.CENTER);
		Logo.setVerticalAlignment(SwingConstants.CENTER);
		frmKcbsEventsSearch.getContentPane().add(Logo);
		
		JLabel lblAllRightsReserved = new JLabel("More Text");
		lblAllRightsReserved.setBounds(5, 66, 503, 18);
		lblAllRightsReserved.setFont(new Font("Times New Roman", Font.PLAIN, 10));
		lblAllRightsReserved.setVerticalAlignment(SwingConstants.TOP);
		lblAllRightsReserved.setHorizontalAlignment(SwingConstants.CENTER);
		frmKcbsEventsSearch.getContentPane().add(lblAllRightsReserved);
		
		String msgtext="<html><font style=\"font-family:'Times New Roman', Times, serif;font-size:12pt\">A whole bunch of text</font></html>";
		JLabel lblNewLabel = new JLabel(msgtext);
		lblNewLabel.setVerticalAlignment(SwingConstants.TOP);
		lblNewLabel.setHorizontalAlignment(SwingConstants.CENTER);
		lblNewLabel.setBounds(5, 235, 502, 170);
		lblNewLabel.setFont(new Font("Times New Roman", Font.PLAIN, 12));
		frmKcbsEventsSearch.getContentPane().add(lblNewLabel);
		
		frmKcbsEventsSearch.addWindowListener(new WindowAdapter() {
			@Override
			public void windowClosing(WindowEvent event) {
				signal.countDown();
			}
		});
	}
}

I'm assuming you can use any jpg and don't need the one I have.

[Michael Dunn]

after adding the imports and a main(), also removing all references to the class CountDownLatch,
the code compiled, ran and displayed my images fine (.gif and .jpg).
The images were in the same folder as the .java and .class files

also, there is a java.awt.SplashScreen class which might make it easier for you.