add examples and fix the dependency problem

ci/docker/runtime_functions.sh

@@ -1210,6 +1210,14 @@ nightly_tutorial_test_ubuntu_python2_gpu() {
     nosetests-3.4 $NOSE_TIMER_ARGUMENTS --with-xunit --xunit-file nosetests_tutorials.xml test_tutorials.py --nologcapture
 }
 
+nightly_java_demo_test_cpu() {
+    set -ex
+    cd /work/mxnet/scala-package/mxnet-demo/java-demo
+    make javademo
+    ./bin/java_sample.sh
+    ./bin/run_od.sh
+}
+
 
 # Deploy
 

scala-package/mxnet-demo/java-demo/Makefile

@@ -16,7 +16,7 @@
 # under the License.
 
 SCALA_VERSION_PROFILE := 2.11
-MXNET_VERSION := 1.4.0-SNAPSHOT
+MXNET_VERSION := [1.4.0-SNAPSHOT,\)
 
 ifeq ($(OS),Windows_NT)
 	UNAME_S := Windows

scala-package/mxnet-demo/java-demo/README.md

@@ -37,6 +37,13 @@ However, you have to define the Classpath before you run the demo code. More inf
 The `CLASSPATH` should point to the jar file you have downloaded.
 
 It will load the library automatically and run the example
+
+In order to use the `Param Object`. We requires user to place this line in the front:
+```
+static NDArray$ NDArray = NDArray$.MODULE$;
+```
+It would help to have the NDArray companion object static and accessable from the outside.
+
 ### Object Detection using Inference API
 We also provide an example to do object detection, which downloads a ImageNet trained resnet50 model and runs inference on an image to return the classification result as
 ```Bash

scala-package/mxnet-demo/java-demo/bin/java_sample.sh

@@ -16,5 +16,5 @@
 # under the License.
 #!/bin/bash
 CURR_DIR=$(cd $(dirname $0)/../; pwd)
-CLASSPATH=$CLASSPATH:$CURR_DIR/target/*:$CLASSPATH:$CURR_DIR/target/classes/lib/*
+CLASSPATH=$CLASSPATH:$CURR_DIR/target/*:$CLASSPATH:$CURR_DIR/target/dependency/*
 java -Xmx8G  -cp $CLASSPATH mxnet.HelloWorld

scala-package/mxnet-demo/java-demo/bin/run_od.sh

@@ -16,5 +16,5 @@
 # under the License.
 #!/bin/bash
 CURR_DIR=$(cd $(dirname $0)/../; pwd)
-CLASSPATH=$CLASSPATH:$CURR_DIR/target/*:$CLASSPATH:$CURR_DIR/target/classes/lib/*
+CLASSPATH=$CLASSPATH:$CURR_DIR/target/*:$CLASSPATH:$CURR_DIR/target/dependency/*
 java -Xmx8G  -cp $CLASSPATH mxnet.ObjectDetection

scala-package/mxnet-demo/java-demo/src/main/java/mxnet/HelloWorld.java

@@ -20,9 +20,13 @@
 import java.util.Arrays;
 
 public class HelloWorld {
+    static NDArray$ NDArray = NDArray$.MODULE$;
+
     public static void main(String[] args) {
     	System.out.println("Hello World!");
         NDArray nd = new NDArray(new float[]{2.0f, 3.0f}, new Shape(new int[]{1, 2}), Context.cpu());
         System.out.println(nd.shape());
+        NDArray nd2 = NDArray.dot(NDArray.new dotParam(nd, nd.T()))[0];
+        System.out.println(Arrays.toString(nd2.toArray()));
     }
 }

tests/nightly/Jenkinsfile

@@ -113,6 +113,14 @@ core_logic: {
         }
       }
     },
+    'Java Demo: CPU': {
+      node(NODE_LINUX_CPU) {
+        ws('workspace/java-demo') {
+          utils.init_git()
+          utils.docker_run('ubuntu_nightly_cpu', 'nightly_java_demo_test_cpu', false)
+        }
+      }
+    },
     'MXNetJS: CPU': {
       node(NODE_LINUX_CPU) {
         ws('workspace/nt-mxnetjs') {