First iteration of support for Java

examples/tutorial/hello/java/.gitignore

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+func.yaml

examples/tutorial/hello/java/Func.java

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+import java.io.*;
+
+public class Func {
+    public static void main(String[] args) throws IOException {
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
+
+        String name = bufferedReader.readLine();
+        name = (name == null) ? "world"  : name;
+
+        System.out.println("Hello, " + name + "!");
+    }
+
+}

examples/tutorial/hello/java/README.md

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+# Oracle Functions: Java
+This is a hello world example of a Oracle Function using the Java runtime.
+
+Firstly, we initialize our function by creating a `func.yaml` using `fn init`. This command can optionally take a `--runtime` flag to explicitly specify the target function runtime. In this example, the target runtime is implied to be Java because there is a `Func.java` file in the working directory.
+
+```sh
+$ fn init <YOUR_DOCKERHUB_USERNAME>/hello-java
+```
+
+This is what our `func.yaml` looks like now.
+
+
+```
+name: mhaji/hello-java
+version: 0.0.1
+runtime: java
+entrypoint: java Func
+path: /hello-java
+max_concurrency: 1
+```
+
+Next, we build and run our function using `fn run`.
+
+
+```sh
+$ fn run
+Hello, world!
+```
+
+You can also pipe input via `stdin` into to the function as follows:
+
+```sh
+$ echo "Michael FassBender" | fn run
+Hello Michael FassBender!
+```
+
+To execute your function via a HTTP trigger:
+
+```sh
+fn apps create myapp
+fn routes create myapp /hello
+curl -H "Content-Type: text/plain" -X POST -d "Michael FassBender" http://localhost:8080/r/myapp/hello
+```