Replace java -jar with picketed code block

README.md

@@ -453,7 +453,9 @@ The [Spring Package maven plugin][spring-package-maven-plugin] collects all the
 
 Now run the following to produce a single executable JAR file containing all necessary dependency classes and resources:
 
-    mvn package
+```sh
+$ mvn package
+```
 
 [spring-package-maven-plugin]: https://github.com/SpringSource/spring-zero/tree/master/spring-package-maven-plugin
 
@@ -463,8 +465,9 @@ Run the batch job
 -------------------
 Run your batch job with `java -jar` at the command line:
 
-    java -jar target/gs-batch-processing-0.1.0.jar
-
+```sh
+$ java -jar target/gs-batch-processing-0.1.0.jar
+```
 
 
 The job prints out a line for each person that gets transformed. After the job runs, you can also see the output from querying the database.