colorize code snippets in README using GFM ``java, ``xml

README.md

@@ -268,6 +268,7 @@ The plugins are discovered automatically at run time. See the [FAQ](#faq) for mo
 
 If you need more control of read parameters and the reading process, the common idiom for reading is something like:
 
+```java
     // Create input stream
     ImageInputStream input = ImageIO.createImageInputStream(file);
 
@@ -312,6 +313,7 @@ If you need more control of read parameters and the reading process, the common
         // Close stream in finally block to avoid resource leaks
         input.close();
     }
+```
 
 Query the reader for source image dimensions using `reader.getWidth(n)` and `reader.getHeight(n)` without reading the
 entire image into memory first.
@@ -321,6 +323,7 @@ It's also possible to read multiple images from the same file in a loop, using `
 
 If you need more control of write parameters and the writing process, the common idiom for writing is something like:
 
+```java
     // Get the writer
     Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(format);
 
@@ -356,6 +359,7 @@ If you need more control of write parameters and the writing process, the common
         // Dispose writer in finally block to avoid memory leaks
         writer.dispose();
     }
+```
 
 For more advanced usage, and information on how to use the ImageIO API, I suggest you read the
 [Java Image I/O API Guide](http://docs.oracle.com/javase/7/docs/technotes/guides/imageio/spec/imageio_guideTOC.fm.html)
@@ -379,6 +383,7 @@ To work around both the discovery problem and the resource leak,
 it is *strongly recommended* to use the `IIOProviderContextListener` that implements
 dynamic loading and unloading of ImageIO plugins for web applications.
 
+```xml
     <web-app ...>
 
     ...
@@ -391,6 +396,7 @@ dynamic loading and unloading of ImageIO plugins for web applications.
     ...
 
     </web-app>
+```
 
 Loading plugins from `WEB-INF/lib` without the context listener installed is unsupported and will not work correctly.
 
@@ -404,6 +410,7 @@ Another safe option, is to place the JAR files in the application server's share
 The library comes with a resampling (image resizing) operation, that contains many different algorithms
 to provide excellent results at reasonable speed.
 
+```java
     import com.twelvemonkeys.image.ResampleOp;
 
     ...
@@ -413,13 +420,14 @@ to provide excellent results at reasonable speed.
 
     BufferedImageOp resampler = new ResampleOp(width, height, ResampleOp.FILTER_LANCZOS); // A good default filter, see class documentation for more info
     BufferedImage output = resampler.filter(input, null);
-
+```
 
 #### Using the DiffusionDither
 
 The library comes with a dithering operation, that can be used to convert `BufferedImage`s to `IndexColorModel` using
 Floyd-Steinberg error-diffusion dither.
 
+```java
     import com.twelvemonkeys.image.DiffusionDither;
 
     ...
@@ -428,7 +436,7 @@ Floyd-Steinberg error-diffusion dither.
 
     BufferedImageOp ditherer = new DiffusionDither();
     BufferedImage output = ditherer.filter(input, null);
-
+```
 
 ## Building
 
@@ -464,10 +472,12 @@ The ImageIO registry and service lookup mechanism will make sure the plugins are
 
 To verify that the JPEG plugin is installed and used at run-time, you could use the following code:
 
+```java
     Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("JPEG");
     while (readers.hasNext()) {
         System.out.println("reader: " + readers.next());
     }
+```
 
 The first line should print:
 
@@ -477,6 +487,7 @@ The first line should print:
 
 To depend on the JPEG and TIFF plugin using Maven, add the following to your POM:
 
+```xml
     ...
     <dependencies>
         ...
@@ -501,6 +512,7 @@ To depend on the JPEG and TIFF plugin using Maven, add the following to your POM
             <version>3.4.1</version>
         </dependency>
     </dependencies>
+```
 
 #### Manual dependency example