Create Image without createImage() for Graphics usage...

[Ruku]

I created an image with the following code:

int pix[] = null;
Image image = createImage(new MemoryImageSource(width, height,
						ColorModel.getRGBdefault(),
						pix, 0, width));

it's working fine,
but when I try to draw within the image using the Graphics object... it's gives me an error at the method

image.getGraphics();

so... I'm currently using this code to fix the situation:

        try {
            image = ImageIO.read(new java.io.File("blank.bmp")); 
        } catch (Exception ex) {
        }

Using a blank bmp to load the initial image... the reason I need to load it without a file is that I need to specify the width and height of the new image...!

I need my project done by midnight... any help before that time will greatly be appreciated... if not then I'll resolve to this file load patch...

[manavo11]

Here is something I had done a while ago... Not sure if it's any help though. It's probably far from a good solution. I don't even remember if all the libraries I've imported are all needed :

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;
import java.awt.Image;
import javax.imageio.ImageIO;
import javax.swing.JLabel;
import javax.swing.ImageIcon;

public class Picture extends Panel
{
	public void createPicture(String fileName)
	{
		JLabel label = new JLabel();
		
		try
		{
			File fImage = new File(fileName);
			if (fImage.exists() == false)
			{
				fImage = new File("noimage.jpg");
			}
			Image image = ImageIO.read(fImage);
			
			label = new JLabel(new ImageIcon(image));
		}
		catch (IOException e)
		{
			System.out.println("No image");
		}
		
		this.setLayout(new BorderLayout());
		this.add(label,BorderLayout.CENTER);
	}
	public Picture(String fileName)
	{
		createPicture(fileName);
	}
}

[Ruku]

good, idea, creating a file instead of loading one... but how would I specify the image width and height from your code?:

fImage = new File("noimage.jpg");

[ComputerJy]

Manavo's code doesn't create a file, it creates an object of class File. uses the ImageIO to read the image from the file

Image image = ImageIO.read(fImage) ;

and puts the image in a label.
Anyway this code is useless for you.

Answering your question: after you create the image from the file, the width and height are set by the VM, you can use

image.getWidth(this);
      image.getHeight(this);

to find the width and height of the image

[ComputerJy]

Here is something I had done a while ago... Not sure if it's any help though. It's probably far from a good solution. I don't even remember if all the libraries I've imported are all needed :

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;
import java.awt.Image;
import javax.imageio.ImageIO;
import javax.swing.JLabel;
import javax.swing.ImageIcon;

public class Picture extends Panel
{
	public void createPicture(String fileName)
	{
		JLabel label = new JLabel();
		
		try
		{
			File fImage = new File(fileName);
			if (fImage.exists() == false)
			{
				fImage = new File("noimage.jpg");
			}
			Image image = ImageIO.read(fImage);
			
			label = new JLabel(new ImageIcon(image));
		}
		catch (IOException e)
		{
			System.out.println("No image");
		}
		
		this.setLayout(new BorderLayout());
		this.add(label,BorderLayout.CENTER);
	}
	public Picture(String fileName)
	{
		createPicture(fileName);
	}
}

those are your proper imports:

import java.awt.* ;
import java.io.* ;

import javax.imageio.* ;
import javax.swing.* ;

[Ruku]

nonono, I don't need to find the height and width... I need to create a blank image with specified height and width... AND be able to use the Graphics class on it...

[ComputerJy]

then you don't need to use the ImageIO class, create an Image normally (setting width and height) and use the createGraphics method on it.

[Ruku]

try it, it causes an exception!

saying the getGraphics method cannot be called over an image produced by the "ImageProducer"...