FULL PRODUCT VERSION :
java version "1.7.0_45", java version "1.6.0_06". Since it is a simple bug I am sure it is there in java 8 also.

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
When I call graphics.getDeviceConfiguration().getBounds() on a Graphics2D object got on a BufferedImage read from a file I continue to get the previous image dimensions after reading a new image.

Please see details with sample program in steps to reproduce.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Below is a sample program which prints image bounds of jpeg files passed as command line args.

Try calling it with paths to 2 images of different dimensions (Example: java GraphicsBug image1.jpg image2.jpg. The dimension of the first image is printed the second time also.

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;


public class GraphicsBug {

    public static void loadJpeg(String imagePath) throws IOException {
        ImageReader reader;
        File srcImageFile = new File(imagePath);
        ImageInputStream iis = ImageIO.createImageInputStream(srcImageFile);
        reader = (ImageReader) ImageIO.getImageReaders(iis).next();
        reader.setInput(iis);
        BufferedImage image = reader.read(0);
        Graphics2D graphics = image.createGraphics();
        System.out.println("Image Bounds from Graphics = " + graphics.getDeviceConfiguration().getBounds());
    }

    public static void main(String [] args) throws IOException {
        for (int i = 0; i < args.length; i++) {
            loadJpeg(args[i]);
        }
    }
}


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The correct image dimensions should be printed for each image. Below are two runs with Expected results:

java GraphicsBug image1.jpg image2.jpg

Image Bounds from Graphics = java.awt.Rectangle[x=0,y=0,width=496,height=64]
Image Bounds from Graphics = java.awt.Rectangle[x=0,y=0,width=672,height=80]

java GraphicsBug image2.jpg
Image Bounds from Graphics = java.awt.Rectangle[x=0,y=0,width=672,height=80]
ACTUAL -
In the first run with 2 images the dimensions of the 1st image is duplicated:

java GraphicsBug image1.jpg image2.jpg
Image Bounds from Graphics = java.awt.Rectangle[x=0,y=0,width=496,height=64]
Image Bounds from Graphics = java.awt.Rectangle[x=0,y=0,width=496,height=64]


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;


public class GraphicsBug {

    public static void loadJpeg(String imagePath) throws IOException {
        ImageReader reader;
        File srcImageFile = new File(imagePath);
        ImageInputStream iis = ImageIO.createImageInputStream(srcImageFile);
        reader = (ImageReader) ImageIO.getImageReaders(iis).next();
        reader.setInput(iis);
        BufferedImage image = reader.read(0);
        Graphics2D graphics = image.createGraphics();
        System.out.println("Image Bounds from Graphics = " + graphics.getDeviceConfiguration().getBounds());
    }

    // Pass Paths to 2 or more images with different dimensions and see the bound printed
    public static void main(String [] args) throws IOException {
        for (int i = 0; i < args.length; i++) {
            loadJpeg(args[i]);
        }
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Do not use graphics.getDeviceConfiguration to get the image bounds get it directly from image.getWidth() and image.getHeight()