Thread: javadisplay images

My only suggestion now is that you drop this course. Programming requires attention to lots of small details.
If you don't want to do that, then you'll have a hard time with programming.

I thought that was what I was trying to do. I'm not going to write the code, I expect you to do that.

Did you do what I suggested here:
How many times does the code go around the while() loop? Add a println() statement inside the loop so you can see how many times the loop is executed.
That will tell you how many images are being returned.

Also can you answer these questions:
Can you describe in English what the program should do with the bytes it reads into the image array in posts #7 and #19?
Every time around the loop a new set of bytes is read into the image array.
What needs to be done each time some bytes are read into the array?

each time the bytes are read it displays another image

Ok. What are the steps the code needs to do for that to happen?

IS THIS CORRECT?

Originally Posted by stresstedout

IS THIS CORRECT?

Not exactly .... and don't use available() if you don't know exactly what it does!

Yesterday I told you some things and more than one time. I don't understand why you don't understand .....

while (result.next()) {
    byte[] image = .........;    // get the array of bytes for the image on current record
    // create the java.awt.Image using Toolkit
    // scale or do other things on the image
    // create an ImageIcon
    // create a JLabel
    // add the JLabel into a container
}

What's the difficulty about this? You have done all these single things but not in this way.

Did the code in post#1 create an image and show it in the GUI?
Can you change the code so that it creates an image each time the image array is filled with bytes instead of only creating one image AFTER the loop finishes?

to create an image each time the image array is filled with bytes

One way would be to move the } at the end of the loop so that the code that creates the image is inside the loop and is executed immediately after the bytes are read.

Can you post the code that you changed that shows where the } was moved to?

ive done it.. i have all three images on my gui frame now. ta for all your patience guys and for keeping me going and sorry for my frustration.

i have all three images

What happened to the other 17 images? I thought there were 20 images.

Originally Posted by stresstedout

1) sort out the layout which isnt going to be easy.

This depends on what you want .....
Layouting with AWT/Swing is not difficult ..... if you have the "basics".

Originally Posted by stresstedout

2) add buttons on top of each label

Each "cell" in GridLayout can contain only 1 component. Instead to put a JLabel into a cell, you should put a JPanel that contains JLabel and JButton laid out using another layout manager (e.g. BorderLayout).

Originally Posted by stresstedout

3) programming the game so when a button is pressed it reveals the image and stays up right, another button is pressed and it reveals that images, if they are the same they stay upright if not then they go back to orignal state.

Wait .... I guess you are doing a "memory" game .....
Are you sure that label+button is a good presentation? Why can't you (or don't want) use mouse events directly on JLabel?

Originally Posted by stresstedout

yh it is a memory game, im not sure or what would be better?

There are many ways to develop and present a "memory" game (just only considering Swing as GUI), so there isn't a unique answer/possibility.

Originally Posted by stresstedout

should i use mouse events directly JLabel?

Technically it's perfectly possible.

Originally Posted by stresstedout

would that mean i would have no buttons?

Using mouse events on JLabel, yes, there's no need of buttons for the cards.

Originally Posted by stresstedout

but i just need to get the gaps small for each icon..

What do you mean? Can you be more precise?

Originally Posted by andbin

What do you mean? Can you be more precise?

i want to position them in a grid with not to much space between. so each label is not too far apart from each other.
because they all print out on to the screen there is no way for me to modify it by sayin label1 label2 so im a little confused

Originally Posted by stresstedout

i want to position them in a grid with not to much space between. so each label is not too far apart from each other.
because they all print out on to the screen there is no way for me to modify it by sayin label1 label2 so im a little confused

GridLayout does a simple thing: it takes the size of the container (in which GridLayout is assigned) and divides it in NxM equally sized cells. So the main question is: who controls the size of the container? This depends ....

If you put a JPanel with GridLayout into the CENTER area of BorderLayout in the content pane, then the size of GridLayout is directly dependent on the size of the frame .... not on the sizes of components into the cells.
If you do this and you enlarge very much the frame, each cell is very big. Each JLabel physically fills the space of the cell, however the image in JLabel does not stretch (this is not a functionality of JLabel) so you see a large space between images.

Keeping the same structure, if you do an initial pack() on the frame, then the GridLayout is sized to its "preferred" size. It means: each cell has the size of the largest JLabel. Since I guess you have same size for all images, you have the minimum size, plus eventual gaps (configurable in GridLayout).

If you put a GridLayout into a component that "respect" the preferred size, you have always this same effect.

are you able to show me a little example? also what is inital pack??? and where does this code go??

Originally Posted by andbin

GridLayout does a simple thing: it takes the size of the container (in which GridLayout is assigned) and divides it in NxM equally sized cells. So the main question is: who controls the size of the container? This depends ....

If you put a JPanel with GridLayout into the CENTER area of BorderLayout in the content pane, then the size of GridLayout is directly dependent on the size of the frame .... not on the sizes of components into the cells.
If you do this and you enlarge very much the frame, each cell is very big. Each JLabel physically fills the space of the cell, however the image in JLabel does not stretch (this is not a functionality of JLabel) so you see a large space between images.

Keeping the same structure, if you do an initial pack() on the frame, then the GridLayout is sized to its "preferred" size. It means: each cell has the size of the largest JLabel. Since I guess you have same size for all images, you have the minimum size, plus eventual gaps (configurable in GridLayout).

If you put a GridLayout into a component that "respect" the preferred size, you have always this same effect.