Create image without seeing it

Hi, i have an applet to draw something on, i have a button when you click on it that create an image and its ok... but the only way i know to create an image is to open the applet, draw what i want onto the Graphics object and display it at the screen, cause if i dont display it on the screen the image will be empty.. so my question is, can i create a image with a text program, if i already have the modification and the background and can load it, i dont want to see it, cause i dont want to load the applet each time i wanna create an image, i would like to create many images with data in my database without having to paint all the image on Graphics object and make it visible to create my image
sorry for the bad explication
thx a lot

to create a image i used this code
            Rectangle rect = dessin.getBounds();
            Image im = createImage(rect.width, rect.height);
            Graphics g = im.getGraphics();
            //write to the image
            //dispose of the graphics content
            g.dispose();where dessin is a JPanel, to be able to create an image i need the JPanel to be visible, so the user see the image before i create it, all is paint on dessin JPanel
but now i want to create an image without make the JPanel visible to the users, but with my method i need too cause it give me a empty image
more understandable? sorry i have problem sometimes explain my problems in english

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