[GitHub] nswamy commented on a change in pull request #12969: [MXNET-1160] add Java build/run example

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nswamy commented on a change in pull request #12969: [MXNET-1160] add Java build/run example
URL: https://github.com/apache/incubator-mxnet/pull/12969#discussion_r228620663
 
 

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 File path: docs/tutorials/scala/mxnet_java_install_and_run_examples.md
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+# Install and run Java Examples
+
+## Prerequisites:
+Please follow the Step 1 in the [Scala configuration](http://mxnet.incubator.apache.org/install/scala_setup.html#setup-instructions)
+These should help you install the correct Java version and all dependencies.
+
+## Import and run the Java package
+For users using a desktop/laptop, we recommend using IntelliJ IDE as it is tested and supported to provide the necessary documentation for the Java API.
+
+Alternatively, users can follow the second instruction to set up an empty Maven project for Java.
+
+### IntelliJ instruction
+If you are using a computer with Ubuntu16.04 or Mac, you can install IntelliJ to run the Java package. Please follow the instruction below:
+
+1. Create a new Java project in IntelliJ. Fire up IntelliJ and click `Create New Project`.
+
+2. Click `Next`, and in the `Create project from template` window, do not select anything and click `Next` again.
+
+3. In the next window choose your `Project name` and the `Project location` and click on `Finish`.
+
+4. Let's add the Java Inference API jars that we grabbed from Maven Central. At the top of the window, Go to the `File -> Project Structure`. In the popup window that opens up, click on `Libraries -> +` and select the path to the jar files downloaded. Click `Apply` and then click `OK`.
+
+6. Create a new Java class under the folder `your-project-name/src`. Let's call this class `JavaSample.java`. Type in the following code snippet and run it. In this code snippet, we create an NDArray object in Java and print its shape.
+```java
+import org.apache.mxnet.javaapi.Context;
+import org.apache.mxnet.javaapi.NDArray;
+
+public class JavaSample {
+public static void main(String[] args) {
+  System.out.println("Hello");
+  NDArray nd = NDArray.ones(Context.cpu(), new int[] {10, 20});
+
+  System.out.println("Shape of NDarray is : "  + nd.shape());
+}
+}
+```
+
+7. If all went well, you should see an output like this : (Ignore the SLF4J warnings).
 
 Review comment:
   weren't these fixed already ? Can you please clean up the warnings. 
   

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