Every JPanel is a container, so either add it to a panel then add it to the container or directly use add(component) or use the getContentPane().add method. Both add the component to the container in Java 7 (I don’t know if version 6 has a problem with this or not).
The AL lib is the “audio library” used by Libgdx (one of the OpenAL variants). I believe this message just means that the audio library is cleaning up some (in your case just one) audio streams/handles for you. If you see this at exit, its harmless as all resources will be cleaned up by the … Read more
Usage depends on whether the component’s parent has a layout manager or not. setSize() — use when a parent layout manager does not exist; setPreferredSize() (also its related setMinimumSize and setMaximumSize) — use when a parent layout manager exists. The setSize() method probably won’t do anything if the component’s parent is using a layout manager; the places this will typically have an … Read more
You may use Graphics.drawPolygon(int[], int[], int) where the first int[] is the set of x values, the second int[] is the set of y values, and the int is the length of the array. (In a triangle’s case, the int is going to be 3) Example: Output:
You should actually take the result from the option pane: Otherwise, it remains set to JOptionPane.YES_NO_OPTION. Cleaner would be: Although, I’m not sure what this line is expected to do in the posted code: remove(dialogButton);. For more details and examples check out How to Make Dialogs tutorial.
This is how you can do it. This code assumes the existance of a buffered image called ‘image’ (like your comment says)
You may use Graphics.drawPolygon(int[], int[], int) where the first int[] is the set of x values, the second int[] is the set of y values, and the int is the length of the array. (In a triangle’s case, the int is going to be 3) Example: Output:
If you have an java.awt.Image, rezising it doesn’t require any additional libraries. Just do: Ovbiously, replace newWidth and newHeight with the dimensions of the specified image.Notice the last parameter: it tells to the runtime the algorithm you want to use for resizing. There are algorithms that produce a very precise result, however these take a large time to complete.You can use any of the following … Read more
To draw a rectangle in Swing you should: First of all, never draw directly in the JFrame or other top-level window. Instead draw in a JPanel, JComponent or other class that eventually extends from JComponent. You should override the paintComponent(Graphics g) method. You should be sure to call the super method You should draw your rectangle with … Read more
Your problem is that you’re creating a BoxLayout for a JFrame (this), but setting it as the layout for a JPanel (getContentPane()). Try: