update code structure

java/examples/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>io.paddle.serving.client</groupId>
+    <artifactId>paddle-serving-sdk-java-examples</artifactId>
+    <version>0.0.1</version>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+                <version>3.8.1</version>
+            </plugin>
+        	<plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <mainClass>my.fully.qualified.class.Main</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-my-jar-with-dependencies</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <nd4j.backend>nd4j-native</nd4j.backend>
+        <nd4j.version>1.0.0-beta7</nd4j.version>
+        <maven.compiler.source>1.7</maven.compiler.source>
+        <maven.compiler.target>1.7</maven.compiler.target>
+    </properties>
+
+    <!--  For development use  -->
+    <!--  Include this if you want to try the latest SNAPSHOT version  -->
+    <repositories>
+        <repository>
+            <id>oss.sonatype.org-snapshot</id>
+            <url>http://oss.sonatype.org/content/repositories/snapshots</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
+    </repositories> 
+
+    <dependencies>
+        <dependency>
+            <groupId>io.paddle.serving.client</groupId>
+            <artifactId>paddle-serving-sdk-java</artifactId>
+            <version>0.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.30</version>
+        </dependency>
+        <dependency>
+            <groupId>org.nd4j</groupId>
+            <artifactId>${nd4j.backend}</artifactId>
+            <version>${nd4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.11</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

java/examples/src/main/java/PaddleServingClientExample.java

+import io.paddle.serving.client.Client;
+/**
+ * Hello world!
+ *
+ */
+public class PaddleServingClientExample {
+    public static void main( String[] args ) {
+        Client client = new Client();
+        System.out.println( "Hello World!" );
+    }
+}

java/paddle-serving-sdk-java/src/main/java/io/paddle/serving/client/Client.java → java/src/main/java/io/paddle/serving/client/Client.java

@@ -31,7 +31,7 @@ public class Client {
     private Set<String> lodTensorSet_;
     private Map<String, Integer> feedTensorLen_;
 
-    Client() {
+    public Client() {
         channel_ = null;
         blockingStub_ = null;
         futureStub_ = null;
@@ -45,7 +45,7 @@ public class Client {
         lodTensorSet_ = null;
         feedTensorLen_ = null;
     }
-
+    
     public Boolean setRpcTimeoutMs(int rpc_timeout) throws NullPointerException {
         if (futureStub_ == null || blockingStub_ == null) {
             throw new NullPointerException("set timeout must be set after connect.");
@@ -164,7 +164,6 @@ public class Client {
                 long[] flattened_shape = {-1};
                 INDArray flattened_list = variable.reshape(flattened_shape);
                 int v_type = feedTypes_.get(name);
-                System.out.println(flattened_list);
                 NdIndexIterator iter = new NdIndexIterator(flattened_list.shape());
                 //System.out.format("name: %s, type: %d\n", name, v_type);
                 if (v_type == 0) { // int64
@@ -406,26 +405,27 @@ public class Client {
         return predict_future;
     }
 
+    
     public static void main( String[] args ) {
-        /*
-        float[] data = {0.0137f, -0.1136f, 0.2553f, -0.0692f,
-                    0.0582f, -0.0727f, -0.1583f, -0.0584f,
-                    0.6283f, 0.4919f, 0.1856f, 0.0795f, -0.0332f};
-        INDArray npdata = Nd4j.createFromArray(data);
-        HashMap<String, INDArray> feed_data
-            = new HashMap<String, INDArray>() {{
-                put("x", npdata);
-        }};
-        List<String> fetch = Arrays.asList("price");
-        */
-        /*
-        Map<String, INDArray> fetch_map = client.predict(feed_data, fetch);
-        for (Map.Entry<String, INDArray> e : fetch_map.entrySet()) {
-            System.out.println("Key = " + e.getKey() + ", Value = " + e.getValue());
-        }
-        */
+        // DL4J（Deep Learning for Java）Document:
+        // https://www.bookstack.cn/read/deeplearning4j/bcb48e8eeb38b0c6.md
+        
+        //float[] data = {0.0137f, -0.1136f, 0.2553f, -0.0692f,
+        //            0.0582f, -0.0727f, -0.1583f, -0.0584f,
+        //            0.6283f, 0.4919f, 0.1856f, 0.0795f, -0.0332f};
+        //INDArray npdata = Nd4j.createFromArray(data);
+        //HashMap<String, INDArray> feed_data
+        //    = new HashMap<String, INDArray>() {{
+        //        put("x", npdata);
+        //}};
+        //List<String> fetch = Arrays.asList("price");
+        
+        //Map<String, INDArray> fetch_map = client.predict(feed_data, fetch);
+        //for (Map.Entry<String, INDArray> e : fetch_map.entrySet()) {
+        //    System.out.println("Key = " + e.getKey() + ", Value = " + e.getValue());
+        //}
+        
         
-        //int[] data = {8, 233, 52, 601};
         long[] data = {8, 233, 52, 601};
         INDArray npdata = Nd4j.createFromArray(data);
         //System.out.println(npdata);
@@ -452,8 +452,8 @@ public class Client {
                 System.out.println("Key = " + e.getKey() + ", Value = " + e.getValue());
             }
         }
-        
     }
+    
 }
 
 class PredictFuture {