Develop Reference

Adding Jlabel on top of canvas

Is there any way that i can add a jlabel on top of the canvas? In my code, the constructor of my frame adds the label first before adding the canvas but when i run it it does not show the label.
I am painting the background of my canvas.

Suggestions:
Don't use Canvas objects. You've got a Swing GUI and should use the Swing equivalent -- a JPanel.
Draw the background image in the JPanel's paintComponent method as the tutorials and hundreds of examples on this site will show you.
Add the JLabel to the JPanel not to the JFrame.
Then add the JPanel to the JFrame.
Layout managers and your understanding of them are critical. Understand that a JPanel uses FlowLayout by default, and if you add a single JLabel to it, it will be placed in the center top region of the JPanel. Requisite Layout Manager Tutorial Link

How to add a background image to a JFrame with no panels, without using a JLabel?

I want to add a background image to a JFrame which doesn't have any panels. It is a project I'm working on and I have almost completed it. So, I can't add a background using a JLabel because I will have to change a lot of code to do that and also I'm using netbeans. Is there any solution for this?

I want to add a background image to a JFrame which doesn't have any panels.
The content pane of the frame is a JPanel, so yes it does have panels.
I have almost completed it. So, I can't add a background using a JLabel because I will have to change a lot of code
If you want a background image then you will need to change your code to make sure the content pane can display the image. So yes you will need to change your code whether you use a JLabel of a JPanel that paints an image.
Check out Background Panel for code that will allow you to use either approach.
The key is that you need to set the content pane of your frame BEFORE you start adding components to the frame. So the code might look something like:
BackgroundPanel panel = new BackgroundPanel( yourImage );
frame.setContentPane( panel );
frame.add(northPanel, BorderLayout.PAGE_START);
frame.add(centerPanel, BorderLayout.CENTER);
I don't know what the Netbeans generated code looks like so I'll leave it up to you to figure out where to put the code.

Grid Layout view Java Swing component position

I have problem using Grid Layout in Java Swing. I create Panel and add GridLayout with 4 columns and 2 rows.
I try to add JButton inside it, but the JButton stretch the width.
Look this image :
I want create JButton position like this, because I want to make image gallery using Java Swing.
Look this image :
Any idea? Thanks before :)

Use GridBagLayout and specify GridBagConstraints. It will help you to render components as you want
Kindly refer GridBagLayout

You can try the layout http://java-sl.com/tip_columns_flow_layout.html
It's kind of Win Explorer layout when components flow to fill columns to available width.

JLabel positioning

I've started doing some experiences with Swing in Netbeans.
I've created two panels and inside each one I've inserted one JLabel.
How can I define the vertical position of my label inside the frame?
Since I'm unable to align the two labels (one on each panel) I would like to set each one to some vertical alignment.

Layouts with layout padding and component borders.
See:
Laying Out Components Within a Container
How to Use Borders

you can use
setBounds(x,y,width,height);
JLabel label = new JLabel();
label.setBounds(10,10,40,20);

java border gui

I am not good with GUIs or User Interfaces in Java.
Would a Border or JPanel be good for something like the image below?
So, what would be the best option for me? Thank you.

Read the section from the Swing tutorial on Using Layout Managers. You can easily nest panels to get the desired effect.
Maybe start with a BorderLayout. Then you can add a panel that uses a GridLayout, which contains all your image tiles, to the CENTER of the BorderLayout. Then you can add the scrollpane containing the text area to the SOUTH. Then you can create another panel to add to the EAST.
Be creative and experiment.

You can make 4 seperate panels for a border, using BorderLayout.NORTH,BorderLayout.EAST,BorderLayout.SOUTH,and BorderLayout.WEST, This is the easiest way in my opinion.
By the way, in the top right of your picture, where you wanted the information panel, you should put an information LABEL (JLabel) instead, because they hold text. JLabel topRight = new JLabel(); then set the text, position, etc.
p.s. to erase the borders around every tile (if you want to do so), use setBorderPainted(false).