Implement the hello-world example in java

[refs #61aa1809f705]

Author: jfahrer

developing/examples/hello-world/java/Dockerfile

@@ -0,0 +1,7 @@
+FROM openjdk:8u151-jdk-alpine
+
+WORKDIR /usr/share/myapp
+COPY HelloWorld.java .
+
+RUN javac HelloWorld.java
+CMD ["java", "HelloWorld"]

developing/examples/hello-world/java/HelloWorld.java

@@ -0,0 +1,5 @@
+class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello World!"); // Display the string.
+    }
+}