I have a JFrame and I want to load a image to it when I click the load image button. Once I click next button I want to change the image. Loading image to a variable is no problem. I load it to Image img. I just want to show it. Which means i want to load it to a JLable or JPanel. How can I do this. Please help me.
Let use ImageIcon & JLabel.setIcon(...)
JLabel supports Icon/ImageIcons. This means that you can create a simple JLabel, pass an ImageIcon to it, and have it display. This should probably cover what you need.
JLabel label = new JLabel(new ImageIcon(image));
Create a custom component and override the paint(Graphics g) method. Use the given Graphics object to paint the image. You could cast to Graphics2D first if you need some more advanced options. Look through the methods defined by Graphics(2D), you'll find what you need pretty soon.
A subclass of JPanel would work well. The best choice really kind of depends on how you managed the contents of the JFrame.
Related
I want to be able to select part of an image in an ImageIcon on JLabel and fill it with color.
Is this possible I have become a little confused as I have read that an ImageIcon is not selectable but I am not sure if that means I have to find another way of displaying the image?
Possible, yes, difficult, yes.
You need to start with a BufferedImage, which you can then wrap in a ImageIcon and apply to a JLabel.
You would then need to register a MouseMotionListener and MouseListener to the label to detect the area which was selected, you would then modify the BufferedImage accordingly and repaint everything.
Having said that, I wouldn't use a JLabel, as you can't accurately calculate the location that the label renders the icon, instead, I'd make myself a custom component, extending from JPanel and encapsulate the functionality within it and use custom painting to paint the image (and the selection area)
Start by having a look at How to Write a Mouse Listener, Performing Custom Painting, 2D Graphics and possibly Reading/Loading an Image, Writing/Saving an Image
I'm using JFileChooser to load images and display them on a JPanel at run time. Is using setIcon() for JLabel a good approach for this, or is there a more adequate approach?
I'd say that a JLabel and setIcon, using an ImageIcon is the easiest way to ensure that the image is actually loaded and properly displayed in your UI.
If you simply store the file-path from the selector and draw the image with a g.drawImage(...) in a paint(Graphics g)-method somewhere, you don't know that the image actually is loaded into memory yet. Of course, this can be remedied by using a MediaTracker, but the above JLabel/ImageIcon-approach does that for you.
I want to change the background image of a JButton in swing,
The method :
Button.setIcon (),
Set’s the icon only not the background,
Is there a easy way to do that?
You can still use setIcon but you will need to set the alignment to make the text appear over the image
button.setHorizontalTextPosition(SwingConstants.CENTER);
One option is to subclass JButton, override paintComponent() method and paint the icon there.
The easy way use SynthLookAndFeel as described here or you could go with creating a class that extends JButton and provide a new implementation of paintComponent(Graphics g)
I need some help with Java Swing components and its capabilities. I need to add a JPanel to a JFrame and paint an Ellipse2D on it. Onto the Ellipse2D I want to add another element, in my case it is a picture (right now I use an ImageIcon, maybe wrong). How can I achieve adding the Ellipse2D and the picture on the panel as shown in the image I attached?
The reason why I need the images separated is, because I need to change the filling color of the ellipse sometimes.
Thanks for any help.
What you need is to create a custom JPanel implementation and override paintComponent method.
Inside it, you just do:
public void paintComponent(Graphics g) {
super.paintComponent(g);
// Draw ellipse here
// Draw your image here. It will be drawn on top of the ellipse.
}
This way, you can hold the ellipse fill color in the CustomPanel class, and just call repaint() method after you change the color.
your idea could be very good described (including code example) in the Oracles tutorial How to Decorate Components with the JLayer Class
notice JLayer is available only for Java7, but its based on (for Java6) JXLayer
you can use (I'm using) GlassPane too, with the same / similair output to the Swing GUI
EDIT
quite easy and nice output is by using OverlayLayout, there is possible to overlay J/Component(s) with Graphics e.g., a few examples
take the two images as image icons like
ImageIcon car=new ImageIcon("image path");
ImageIcon elipse=new ImageIcon("image path");
add those two image icons two label
JLabel carLabel=new JLabel(car);
JLabel ellipseLabel=new JLabel(ellipse);
and set the position of ellipse and car
carLabel.setBounds(0,0,50,50);
ellipseLabel.setBounds(10,10,50,50);
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