Java.awt.Image getWidth() and getHeight() not working!

Right- this is want I want to do.
I have a background image which is added as a background image to a third party API class which extends Java.awt.Container. Such container is then added to the Content Pane of MyClass (which extends JFrame)
I want to read the width and height of the image and resize MyClass accordingly.
Problem is calling theImage.getWidth(MyClass.this) or theImage.getWidth(theThirdPartyAPIContainer) always return -1 and -1 denoting that no information is available.
What do I need to do to obtain the height and width?

Post here, cos don't know your email.
Anyway
- Can't use setPreferredSize because the Conatiner which is added to the ContentPane is a Awt Component not a Swing JComponent!
- Also, the background is added AFTER the this.pack()and this.show().
-I figured out that I could access Insets.top, Insets.left, Insets.right, Insets.bottom.
I have basically the following
|JMenuBar |
L____________________________________________|
| |
| |
| |
| Third Party Class extending java.awt.Container |
| containing an image of known size |
| |
L____________________________________________|
I am fine for the width I do
Insets frameInsets = this.getInsets();
width = image.getWidth() + frameInsets.left + frameInsets.right;
Height is the problem
After some Trial an error it LOOKS on Solaris as if the following is right-
height = image.getHeight()+frameInsets.top+ myJMenuBar.getSize()+getHeight+ myJMenuBar.getInsets().top + myJMenuBar.getInsets().bottom
I cannot comprehend whether this is just a coincidence or not as I don't know why frameInsets.bottom should in any case be excluded.
Here are the dimensions-
frameInsets.left = 6
frameInsets.right= 6
frameInsets.top =28
frameInsets.bottom = 6
JMenuBar height = 23
JMenuBar's Insets.top = 1
JMenuBar's Insets.bottom = 1
What should be the 'correct' calculations and does the Insets for the JMenuBar and the JFrame overlaps?

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..But the maximum value of the int data type is 2,147,483,647. That is the maximum positive integer value that can be stored in (the 4 bytes of) a signed int, but..
..The value that I passed in the int array size is only 90,189,840...its only connection with RAM is that each int requires 4 bytes of memory to hold it.
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Java.awt.Image getWidth() and getHeight() not working!

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