ImageIO: getImageWritersByFormatName(String formatName)
import java.util.Iterator; import javax.imageio.ImageIO; public class Main { public static void main(String[] argv) throws Exception { boolean b; // Check availability using a format name b = canWriteFormat("foo"); // false b = canWriteFormat("gif"); // true b = canWriteFormat("giF"); // true } public static boolean canWriteFormat(String formatName) { Iterator iter = ImageIO.getImageWritersByFormatName(formatName); return iter.hasNext(); } }