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Java problems with gif in label

A gif that I tried to put into a JPanel isn't showing up after clicking the button that triggers it until I resize the window. When it does show up, it does not fit the JPanel and is not animated. I looked at several posts that dealt with this but I don't understand how to use them in my case.
/*
* Author: Raymo111
* Date: 13/04/2018
* Description: Wishes happy birthday to a special someone
*/
//Imports java GUI classes
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
// Main class with JFrame and ActionListener enabled
public class Happy_Birthday_GUI extends JFrame implements ActionListener {
// Class variables
private static JButton startButton = new JButton("CLICK TO START");
private static JPanel startPanel = new JPanel(), gifPanel = new JPanel();
private static Color blue = new Color(126, 192, 238), pink = new Color(255, 192, 203);
private static GridLayout grid1 = new GridLayout(1, 1);
// Constructor
public Happy_Birthday_GUI() {
// Initial screen
startButton.addActionListener(this);
startButton.setFont(new Font("Comic Sans MS", Font.PLAIN, 50));
startPanel.setLayout(grid1);
startPanel.add(startButton);
startPanel.setBorder(BorderFactory.createLineBorder(blue, 100));
startButton.setBackground(pink);
getContentPane().add(startPanel);
// Sets title, size, layout (grid 1x1), and location of GUI window (center)
setTitle("Happy Birthday from Dolphin");
setSize(840, 840);
setLayout(grid1);
setLocationRelativeTo(null);
setVisible(true);
}
// Main method
public static void main(String[] args) {
new Happy_Birthday_GUI();
}
// Action Performed method
public void actionPerformed(ActionEvent event) {
// Proceed to gif and song
if (startButton == event.getSource()) {
getContentPane().removeAll();
BufferedImage dolphin;
gifPanel.setLayout(grid1);
gifPanel.setBorder(BorderFactory.createLineBorder(pink, 100));
try {
dolphin = ImageIO.read(new File("C:\\Users\\raymo\\Pictures\\dolphin.gif"));
JLabel gifLabel = new JLabel(new ImageIcon(dolphin));
gifPanel.add(gifLabel);
} catch (IOException e) {
e.printStackTrace();
}
getContentPane().add(gifPanel);
}
}
}
Here is dolphin.gif. It's cute.
How do I get it to show up immediately after clicking the start button as an animated gif that fits the JPanel? Thanks in advance.

BufferedImage doesn't support painting animated Gifs, instead, you'll need to make use of Image (or preferably, ImageIcon).
This could then be applied directly to a JLabel, which will perform the animation operation itself.
animated gif that fits he JPanel?
Okay, that's a much more complex problem. One approach would be to convert the Gif to the required size, but needless to say, that's very, very complex.
A simpler solution might be to use a AffineTransform and scale the image to meet the requirements of the component itself. This would require a custom component, capable of calculating the scale and painting each frame of the image.
Luckily for you, JPanel is an ImageObserver, this means it's capable of painting the gif animation
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private ImageIcon image;
public TestPane() {
image = new ImageIcon("/Users/swhitehead/Downloads/NbENe.gif");
}
#Override
public Dimension getPreferredSize() {
return new Dimension(600, 600);
}
#Override
protected void paintComponent(Graphics g) {
int imageWidth = image.getIconWidth();
int imageHeight = image.getIconHeight();
if (imageWidth == 0 || imageHeight == 0) {
return;
}
double widthScale = (double)getWidth() / (double)imageWidth;
double heightScale = (double)getHeight() / (double)imageHeight;
Graphics2D g2d = (Graphics2D) g.create();
g2d.drawImage(image.getImage(), AffineTransform.getScaleInstance(widthScale, heightScale), this);
g2d.dispose();
}
}
}

I tried to put into a JPanel isn't showing up after clicking the button
When you add (or remove) components from a visible GUI the basic code is:
panel.add(...);
panel.revalidate();
panel.repaint();
The revalidate() is need to invoke the layout manager so the component is given a size.
is not animated.
Use a JLabel with an ImageIcon to display images. A JLabel will animated the gif.
When it does show up, it does not fit the JPanel and
You can try the Stretch Icon which is designed to fill the space available to the label.

I ended up doing:
gifPanel.add(new TestPane());
getContentPane().add(gifPanel);
revalidate();
repaint();
using camickr's revalidate and repaint, and MadProgrammer's TestPane class,
which worked very well to get the gif to animate, resize correctly and display immediately.

Graphics doesn't draw image in java

I have this class which should draw an image.
package ro.adlabs.imnuriAZSMR.UIClases;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
public class JImage extends JPanel {
private BufferedImage image;
private int height;
private int width;
public JImage(String imagePath,int height,int width) {
try {
image = ImageIO.read(getClass().getResourceAsStream(imagePath));
} catch (IOException ex) {
ex.printStackTrace();
}
this.width = width;
this.height = height;
}
public JImage(String imagePath,int size){
new JImage(imagePath,size,size);
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, width, height, this);
}
}
And this Class which show an About Dialog:
package ro.adlabs.imnuriAZSMR.UIClases;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class AboutDialog extends JDialog {
public AboutDialog() {
setTitle("About");
setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
JLabel name = new JLabel("<html><div style='text-align: center;'>Aceasta aplicatie e dezvoltata sub Termenii si Conditiile ADLabs.</div></html>");
JLabel copyright = new JLabel("© ADLabs - www.adlabs.ro");
name.setAlignmentX(0.5f);
copyright.setAlignmentX(0.5f);
add(name);
add(new JImage("../ico/appicon_200x200.png",50));
add(copyright);
JButton close = new JButton("Close");
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
dispose();
}
});
close.setAlignmentX(0.5f);
add(close);
setModalityType(ModalityType.APPLICATION_MODAL);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setSize(300, 200);
}
}
I add to the dialog the Image which is the app logo. First time when I created the JImage class it worked, it drawn the picture. Then I added the method:
setSize(width+20,height+20);
to the Jpanel in the JImage class and when I ran the program again it didn't draw the image. Then anything I did it didn't solve this wierd bug.
Anyone has any ideea? What am I doing wrong?

Graphics doesn't draw image in java
You are using a BoxLayout. A BoxLayout will use the preferred size information of the panel when doing the layout. Your preferred size is (0, 0) so there is nothing to paint.
You need to override the getPreferredSize() method of the panel when you do custom painting to return the size of your component so layout managers can do their job.
However, as already mention there is no need to create a custom class as you can just use a JLabel to display an image. The only time you do custom painting is when you need to somehow modify the image when it is painted.

You are using a resource path, not a file system path. Such a path may not contain .. and is either relative to the package directory of the class or absolute.
new JImage("../ico/appicon_200x200.png", 50)
should become something like:
new JImage("/ro/adlabs/imnuriAZSMR/ico/appicon_200x200.png", 50)
Also:
public JImage(String imagePath, int size){
new JImage(imagePath, size, size);
}
should be
public JImage(String imagePath, int size){
this(imagePath, size, size);
}

How to import image into JPanel

I am working on an assignment (GASP) and having issues with my image displaying. I am not looking for someone to complete my assignment for me but I desperately need some help figuring out why my code is not working properly. I have reviewed my Java Programming book as well as searched for the answers online to no avail so if someone could lead me in the right direction I would greatly appreciate it!!
Here is my displayImage code:
import java.awt.Graphics;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class DisplayImage extends JFrame {
public void DislayImage(){
add (new ImagePanel());
}
public static void main(String[] args) {
JFrame frame = new DisplayImage ();
frame.setTitle("Go Bearcats!");
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
Assignment02 a = new Assignment02();
frame.add(a);
}
}
class ImagePanel extends JPanel {
public final static String LOC = "C:\\UCincinnatiLogo.jpg";
private ImageIcon imageIcon = new ImageIcon (LOC);
private Image image = imageIcon.getImage();
#Override /**Draw image on the panel*/
protected void paintComponent(Graphics g){
super.paintComponent(g);
if (image !=null)
g.drawImage(image, 200, 200, getWidth(), getHeight(), this);
}
}

You're adding a component right on top of your image panel. The JFrame uses borderLayout, so anything added to it as you're doing will cover anything added previously.
JFrame frame = new DisplayImage ();
frame.setTitle("Go Bearcats!");
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
Assignment02 a = new Assignment02();
frame.add(a); // here you add something on top of your imagePanel
Instead, make the ImagePanel the JFrame's contentPane via setContentPane(...), and then add things to the JFrame/contentPane, but be sure that they're not opaque.
public class DisplayImage extends JFrame {
public void DislayImage(){
setContentPane(new ImagePanel());
}
and then,
Assignment02 a = new Assignment02();
a.setOpaque(false);
frame.add(a);
Note, as an aside, I rarely create any classes that extend JFrame, and instead create my JFrame when needed. Instead I'd create my ImagePane and then add components directly to it before adding all to a JFrame.
Also you don't show us the Assignment02 class, but it had better have non-opaque JPanels and components.

Java JTabbedPane Inset Color

I was wondering how you would get the color of the inset of a JTabbedPane. I cannot seem to get this color. Every attempt I make I get 236,236,236 which is the outside frame color, where the inside frame color is about 10 darker, 227,227,227 (using the built in apple color meter).
I am setting the look and feel using UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
You can see this in an image that I found on the internet. http://pagesofinterest.net/wordpress/wp-content/uploads/2009/06/Quaqua-Maven-Netbeans.jpg Where the words "Panel's Title" is the area that I am getting the lighter color that is not useful to me. Inside the round corners is the darker color I am trying to obtain. I tried getting the color of the content pane to no avail.
Thanks for all your help!
**EDIT:**Added code! As you see, I am trying to get the color of the area inside the rounded corners(if your on a mac) not the color of the frame or the tabs that say "1" "2". I have attached a photo and I am trying to get the background color of the portion that says "Here" Thanks!
import java.awt.Container;
import javax.swing.JFrame;
import javax.swing.JTabbedPane;
import javax.swing.UIManager;
public class main {
JFrame frame;
Container c1 = new Container();
Container c2 = new Container();
JTabbedPane top = new JTabbedPane();
static main GUI;
public void createGUI(){
frame = new JFrame();
Container c = frame.getContentPane();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
top = new JTabbedPane(JTabbedPane.TOP);
top.setFocusTraversalKeysEnabled(false);
top.setFocusable(false);
top.addTab("1", c1);
top.addTab("2", c2);
frame.setSize(315,450);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setResizable(true);
c.add(top);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {}
GUI = new main();
GUI.createGUI();
}
}
EDIT: camickr, Here is a screenshot of the UIManager Defaults. Unfortunately none of there colors in the are the correct color that the inset is.

You might be able to use UIMangaer Defaults to find the color.

You can override paintComponent() to use a GradientPaint in the tab's background, as shown below. A few notes,
Let the content adopt the preferred size of it contents, as shown here.
Construct the GUI in the event dispatch thread.
Use conventional Java names.
Addendum: the elements are not always in the same spot, so I do not know what place to get the color.
It sounds like you want to match a color used internally by the TabbedPaneUI delegate. One approach would be as follows:
Render a BufferedImage of the component, as shown here.
Determine the coordinates of a Point in top relative to the top of c1.
Point p = SwingUtilities.convertPoint(c1, 0, -1, top);
Obtain the color using getRGB(), as shown here; use Zoom to verify the result.
import java.awt.Color;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
/** #see https://stackoverflow.com/a/16625260/230513 */
public class Main {
JFrame frame;
Container c1 = new GradientPanel();
Container c2 = new GradientPanel();
JTabbedPane top = new JTabbedPane();
private static class GradientPanel extends JPanel {
public GradientPanel() {
this.add(new JLabel("Here"));
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
GradientPaint p = new GradientPaint(0, 0, Color.white,
getWidth(), getHeight(), Color.gray);
g2d.setPaint(p);
g2d.fillRect(0, 0, getWidth(), getHeight());
}
}
public void createGUI() {
frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
top = new JTabbedPane(JTabbedPane.TOP);
top.addTab("1", c1);
top.addTab("2", c2);
frame.add(top);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new Main().createGUI();
}
});
}
}

How to get the painted size of a Swing component?

When I add Swing component (like a JButton) to a JPanel, it renders with it's 'preferred size'.
However, the preferred size is actually larger than the painted button. There appears to be an invisible border around it.
Here's a simple frame with my test panel:
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TestPanel pnl = new TestPanel();
frame.getContentPane().add(pnl);
frame.pack();
frame.setVisible(true);
Here's my test panel ...
public class TestPanel extends JPanel {
JButton btn1 = new JButton("Test1");
JButton btn2 = new JButton("Test2");
public TestPanel() {
this.add(btn1);
this.add(btn2);
}
public void paint(Graphics g) {
super.paint(g);
g.setColor(Color.RED);
Dimension dim = btn1.getPreferredSize();
g.drawRect(btn1.getX(), btn1.getY(), (int)(dim.getWidth()), (int)(dim.getHeight()));
}
}
Notice I painted btn1's "PreferredSize" in RED to demonstrate that the preferredSize is actually larger than the button itself.
My question is, how can I determine the width and height of the painted button, not the JButton's preferredSize?
Any help is greatly appreciated, thanks!
UPDATE
Because I actually need this to work for all Swing components, here's a screen shot with the more components.
Unfortunately, I need to figure this out, determining the "real" size of the visible widget is crucial to my application.

I don't think this is particular or practically achievable.
The problem is, the button is using the "unpainted" area to paint other elements, like the focus highlight.
You could try look at the AbstractButton#set/getMargin

If nothing better comes along, note that the authors "recommend that you put the component in a JPanel and set the border on the JPanel."
Addendum: Based on your comments below, it's clear that your question is not about rendering borders but about establishing a component's boundary. What you perceive as unused space is actually reserved by the UI delegate for any number of uses, e.g. selection highlighting or esthetic coherence. You can get an idea of how this varies by selecting different Look & Feel themes in the examples here and here.
Using getbounds():
Using setBorder():
import component.Laf;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Rectangle;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/**
* #see https://stackoverflow.com/a/15490187/230513
*/
public class Test {
private void display() {
JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLayout(new FlowLayout());
// https://stackoverflow.com/a/11949899/230513
f.add(Laf.createToolBar(f));
f.add(decorate(new JButton("Test")));
f.add(decorate(new JTextField("Test")));
f.add(decorate(new JTextArea(3, 8)));
f.add(decorate(new JCheckBox("Test")));
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
private JPanel decorate(final JComponent c) {
JPanel p = new JPanel() {
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Rectangle r = c.getBounds();
g.setColor(Color.red);
// NB pen hangs down and to the right
g.drawRect(r.x - 1, r.y - 1, r.width + 1, r.height + 1);
}
};
p.add(c);
return p;
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new Test().display();
}
});
}
}