Update README.md

Syntax highlighting.

Author: DigNZ

README.md

@@ -31,7 +31,7 @@ Example Code
 ------------
 Basically use `QRScanner` instead of `CodeScanner`.
 
-```
+```java
 QRScanner.scanQRCode(new ScanResult() {
     public void scanCompleted(String contents, String formatName, byte[] rawBytes) {
         Dialog.show("Completed", contents, "OK", null);
@@ -51,7 +51,7 @@ Converting an existing app
 It should pretty much be a drop in replacement for CodeScanner.  If you need to detect if code scanning is supported on the current platform then you need to keep the original check
 do not change this line to QRScanner:
 
-```
+```java
 if (CodeScanner.getInstance() != null) {
     QRScanner.scanQRCode(myScanResult);
 } else {