EXIF Data Writing using in java

Hello, Here is the work description. I have a JPEG or TIFF or PNG. by using that image am created a thumbnail with 100 X 100 size. For this thumb nail i want to set some values in EXIF data. Say example i want to set the following values, Make: 'Test' Model: 'Canon IXY DIGITAL 70' XResolution: 180 YResolution: 180 Modify Date: '2009:05:04 09:56:24' Create Date: '2009:05:04 09:56:24' After setting these values i need to read these values thru my iPhone EXIF viewer. Regards Viswa