I want to display an image in my Java application. I found a code to download the image from the webserver and show it in the jframe.
I want to use a label to show the image or something else. It shouldn't be JFrame.
Here is my code:
Image image = null;
try {
URL url = new URL(
"http://www.personal.psu.edu/acr117/blogs/audrey/images/image-2.jpg");
image = ImageIO.read(url);
} catch (IOException e) {
}
// Use a label to display the image
JFrame frame = new JFrame();
JLabel lblimage = new JLabel(new ImageIcon(image));
frame.getContentPane().add(lblimage, BorderLayout.CENTER);
frame.setSize(300, 400);
frame.setVisible(true);
Can someone help me?
Using the code you provided, you already have the image in a JLabel called lblimage. You can now add that to a panel or any other container object, like so:
JPanel mainPanel = new JPanel(new BorderLayout());
mainPanel.add(lblimage);
// add more components here
frame.add(mainPanel);
frame.setVisible(true);
You can treat that label (lblimage) just like you would any normal component.
You could try doing this instead:
import javax.swing.ImageIcon;
...
JLabel image = new JLabel(new ImageIcon("imageName.png"));
...
frame.add(image);
I find it to be much easier to do :D
EDIT: Upon reading the question for the 4th time, I realized that this is exactly what you did in the question. Now, I'm having trouble figuring out what exactly you're asking for.
I would add two notes to the other useful answers:
1) Don't swallow exceptions; write to a log or at least print a stack trace.
catch (IOException e) { e.printStackTrace(); }
2) Instead of writing frame.setSize(300, 400), use pack(), which "Causes this Window to be sized to fit the preferred size and layouts of its subcomponents." In this way, the picture's original dimensions will be used. This is also the foundation of #camickr's suggestion to read about Layout Managers.
Your code already does what you need ( to display it in other than a JFrame - that's a JLabel - )
For what you say in your comments, to try to drag and drop and add more components I think what you need is to use a GUI BUilder to achieve what you want ( which is not only show the image but add other components )
I would recommend you yo use IntelliJ IDEA's GUI Builder
In order to have a complete overview on how Swing works and what can you with it, you can also take a look at: The swing tutorial
and i want to add more and more items
(buttons and labels ) to my GUI. can
you please help me
Your question has nothing to do with labels and images. You need to understand how to use Layout Managers to organize the components you add to a frame.
So start by reading the Swing tutorial on Layout Managers. There are plenty of examples you can download and play with. Also you can nest different layout managers on different panels.
Try this:
JLabel lblNewLabel_1 = new JLabel("");
lblNewLabel_1.setIcon(new ImageIcon(MainMenu.class.getResource("/Images/Bugs.png")));
Related
I'm a somewhat novice programmer and I'm have some trouble adding an image to my frame. While I know how to add images generally, this specific case it does not work.
public class Tutorial extends JFrame{
Tutorial(){
JFrame frame = new JFrame("ImageTutorial");
frame.setVisible(true);
frame.setSize(750,850);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(null);
ImageIcon image = new ImageIcon(getClass().getResource("Green Block.png"));
JLabel imagelabel = new JLabel(image);
imagelabel.setBounds(10, 10, 75, 75);
imagelabel.setOpaque(true);
frame.add(imagelabel);
Now, I've located the problem but I don't understand 'why' its a problem. When I remove
frame.setSize(750,850);
the image shows, but when its there it doesn't. How can the frame's size impact the image showing and how can I get around it?
Just curious, logically, what makes you think a frame should be visible before you add any components? Logically speaking, wouldn't it seem right to add your components first, then make the frame visible. It's like displaying a painting in an art gallery even before the painter has painted anything on it. It just makes no sense. I highly doubt setting the size has anything to do with it. IF you don't set the size of the frame, then the frame appears as small as possible. When you resize the frame, it causes a repaint, then showing the label you add. But generally, you want to always set frame visible after all you components are added, to avoid this problem.
Side note: You should stay away from null layouts. You need to learn to use Layout Managers and let them do the dynamic sizing and locating for you.
I would like to know how to put a JLabel on top of another JLabel at a specific position, in a class that extends JPanel in Java. People have asked for help with this before but the solutions that I found do not satisfy me. I am using GridLayout, here is some of my code:
//imports
public class Game extends JPanel implements MouseListener {
Icon background = new ImageIcon(getClass().getResource("/background.jpg"));
Icon foreground = new ImageIcon(getClass().getResource("/foreground.jpg"));
JLabel backgr = new JLabel(background);
JLabel foregr = new JLabel(foreground);
JFrame frame = new JFrame("Game");
public Game() {
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridBagLayout());
backgr.addMouseListener(this);
frame.setLayout(new FlowLayout());
frame.setPreferredSize(new Dimension(200,200));
frame.pack();
frame.setVisible(true);
frame.addMouseListener(this);
backgr.setLayout(new BorderLayout());
frame.add(backgr);
backgr.add(foreground);
}
}
(I have a lot of other methods in this class, such as some mouse stuff, but I don't include them here since they are not relevant to this problem.)
Currently the code almost works as I want, the foreground picture is displayed on top of the background, right in the middle of it. But I would like the foreground picture to be displayed at specific coordinates on the background picture. I thought that if I wanted to display the foreground at coordinates (50, 50), I could say backgr.add(foreground, 50,50), this compiles but returns an error when I run the program. Any tips of what to do? It would be really appreciated.
Edit: I discovered that by saying backgr.setLayout(null), backgr.add(foregr) and then foregr.setLocation(50,50), we can do what I was looking for. But since not using a layout manager is discouraged, I am looking for better solutions, so that I can use the coordinates on the backgr Icon.
People have asked for help with this before but the solutions that I found do not satisfy with me since they require me to set the frame layout to null, but I am using GridBagLayout
The frame is using a GridBagLayout.
You are adding the foreground JLabel, so the background JLabel. The background label can use any layout (including null) that you wish.
the foreground picture is displayed on top of the background, right in the middle of it.
That is because you are using a BorderLayout and are adding the foreground to the CENTER, which is the default when you don't specify a constraint.
I am designing a form in java using JDeveloper.
I am new to JDeveloper.
In JDeveloper tool I didn't found any option to directly add image to form like .Net.
And I don't know how to add image to form manually.
is there any other way to solve it out.
So please help me to solve it.
As simple as this :
image = ImageIO.read(new File(path));
JLabel picLabel = new JLabel(new ImageIcon(image));
Yayy! Now your image is a swing component ! add it to a frame or panel or anything like you usually do! Probably need a repainting too , like
jpanel.add(picLabel);
jpanel.repaint();
Don't know about JDeveloper but in code you have following possibilities:
Create an ImageIcon of the image then set that to a jLabel and add jLabel to your frame.
Override paintComponents() of your frame to draw image using Graphics in it. {Not sure about this}
Override paintComponent() of some panel or any other component to draw image using Graphics in it and then add that component to frame..
You can use Labels as Sanjay says.
also using layered pane you can use as background image.
You can try doing it this way:
ImageIcon image = new ImageIcon(getClass().getResource("imageName.png"));
JLabel lblImage = new JLabel(image);
line 1 of the code will get the image ensure that the image is in the same folder you are saving your work
This is my first time using a JFrame. I can't get the window to display the text areas I've nested inside the JFrame. I am trying to get the text field with my name in it to display above the tabulated results, which I have omitted the formatting for until I can get the JFrame to work.
public void printResults(String[] names, int[] temp, int[][] scores, float[] averages, char[] letters){
JTextArea outarea= new JTextArea(5,20);
JTextArea name = new JTextArea(5,20);
Font font = new Font("Tahoma", Font.BOLD, 48);
name.setFont(font);
name.setText("Made By Durka Durka");
JFrame window = new JFrame();
window.getContentPane().add(name);
window.getContentPane().add(outarea);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.pack();
window.getContentPane().setVisible(true)
String out = "foo";
outarea.setText(out);
//JOptionPane.showMessageDialog(null,window);
}
The probable reason why the JFrame is not appearing is because of this line:
window.getContentPane().setVisible(true)
The above line is setting the visibility of the Container to which the JTextAreas have been added, but does not control the visibility of the JFrame itself -- therefore, the JFrame itself is not being displayed.
(To be more precise, the JFrame.getContentPane method returns a Container, so the above code is actually calling the Containter's setVisible method.)
Try the following instead:
window.setVisible(true);
This will set the visibility of the JFrame itself to be visible.
Also, as the other answers have suggested, try using Layout Managers to control the locations of where the components should be displayed. The following are links to using two of the several Layout Managers which could be used to layout components.
How to Use BorderLayout
How to Use GridLayout
You should use some of the layout managers. This link should help you:
http://java.sun.com/docs/books/tutorial/uiswing/layout/using.html
The standard java layout managers are sometimes really hard to handle. Maybe you should also look into the JGoodies: http://www.jgoodies.com/ "Framework". It is easier to use and you realize that even a java gui can look nice..
First things first - are you calling printResults on the Event Dispatch Thread using SwingUtilities.invokeLater(Runnable runnable); or SwingUtilities.invokeAndWait(Runnable runnable);? Remember that you need to do all GUI work on the EDT.
If so, try this:
JFrame window = new JFrame();
// CHANGES HERE
window.getContentPane().setLayout(new BorderLayout();
window.getContentPane().add(name, BorderLayout.NORTH);
window.getContentPane().add(outarea, BorderLayout.CENTER);
// END CHANGES
I'm building a little app using Java and Swing in NetBeans. Using NetBeans design window, I created a JFrame with a JPanel inside.
Now I want to dynamically add some jTextFields to the JPanel.
I wrote something like that:
Vector textFieldsVector = new Vector();
JTextField tf;
int i = 0;
while (i < 3) {
tf = new JTextField();
textFieldVector.add(tf);
myPanel.add(tf); //myPanel is the JPanel where I want to put the JTextFields
i++;
}
myPanel.validate();
myPanel.repaint();
But nothing happens: when I run the app, the JFrame shows with the JPanel inside, but the JTextFields don't.
I'm a total newbie in writing graphical Java apps, so I'm surely missing something very simple, but I can't see what.
In the Netbeans GUI, set the layout manager to something like GridLayout or FlowLayout (just for testing). You can do this by going to the GUI editor, clicking on your panel, and then right-clicking and selecting a layout.
Once you've changed to a different layout, go to the properties and alter the layout properties. For the GridLayout, you want to make sure you have 3 grid cells.
Instead of myPanel.validate(), try myPanel.revalidate().
The more canonical way to do this is to create a custom JPanel (without using the GUI editor) that sets its own layout manager, populates itself with components, etc. Then, in the Netbeans GUI editor, drag-and-drop that custom JPanel into the gui editor. Matisse is certainly capable of handling the runtime-modification of Swing components, but that's not the normal way to use it.
It's been a while since I've done some Swing but I think you'll need to recall pack() to tell the frame to relayout its components
EDIT: Yep, I knew it had been too long since I did Swing. I've knocked up the following code which works as expected though and adds the textfields...
JFrame frame = new JFrame("My Frame");
frame.setSize(640, 480);
JPanel panel = new JPanel();
panel.add(new JLabel("Hello"));
frame.add(panel);
frame.setLayout(new GridLayout());
frame.pack();
frame.setVisible(true);
Vector textFieldVector = new Vector();
JTextField tf;
int i = 0;
while (i < 3) {
tf = new JTextField();
textFieldVector.add(tf);
panel.add(tf); //myPanel is the JPanel where I want to put the JTextFields
i++;
}
panel.validate();
panel.repaint();
Your while loop is wrong. i never gets incremented so your window creation is in an endless loop and your CPU consumption should be at 100% until you abort the program. Also, the GUI should be completely non-responsive when you run your program.
The usual way to use GroupLayout is to add a component to a Group. GroupLayout keeps a reference to the Container it is responsible for (which makes sense). You shouldn't be adding the component to the panel without constraints.
Don't use GroupLayout with new (dynamically added) component. It won't show up.
Just use the .setVisible() method of JTextField:
JTextField tf = new JTextField() ;
tf.setVisible(true) ;
panel.add(tf) ;