Add Java Quickstart Example

.gitignore

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 .venv
 
 .vscode/
-.DS_Store
+.DS_Store
+
+examples/*/target

examples/ags-java-example/README.md

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+## To run Java example
+
+#### Reqs: Java 11+
+
+```
+cd ags_java_example
+mvn clean install -q
+java -jar target/ags-java-example-1.0-jar-with-dependencies.jar
+```
+Example output:
+```
+CONNECTED TO GRAPH; ADDING ELEMENTS
+READING BACK DATA...
+Edge: e[/////////+b/////////5g==][-51-connects->-52]
+Out from: v[-51]
+In to: v[-52]
+v[-51] has Properties:
+--> vp1 : vpv1
+--> vp2 : vpv2
+DONE; CLOSING CONNECTION!
+```

examples/ags-java-example/pom.xml

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+<?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>aerospike.com</groupId>
+    <artifactId>ags-java-example</artifactId>
+    <version>1.0</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <tinkerpop.version>3.7.2</tinkerpop.version>
+        <junit.version>4.13.1</junit.version>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.tinkerpop</groupId>
+            <artifactId>gremlin-core</artifactId>
+            <version>${tinkerpop.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.tinkerpop</groupId>
+            <artifactId>gremlin-driver</artifactId>
+            <version>${tinkerpop.version}</version>
+        </dependency>
+
+    </dependencies>
+
+<build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>11</source>
+                    <target>11</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <mainClass>aerospike.com.Main</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

examples/ags-java-example/src/main/java/aerospike/com/Main.java

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+package aerospike.com;
+
+import org.apache.tinkerpop.gremlin.structure.Vertex;
+import org.apache.tinkerpop.gremlin.structure.Edge;
+import org.apache.tinkerpop.gremlin.driver.Cluster;
+import org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteConnection;
+import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
+import static org.apache.tinkerpop.gremlin.process.traversal.AnonymousTraversalSource.traversal;
+
+
+public class Main {
+    private static final String HOST = "localhost"; 
+    private static final int PORT = 8182;
+    private static final Cluster.Builder BUILDER = Cluster.build().addContactPoint(HOST).port(PORT).enableSsl(false);
+
+    public static void main(String[] args) {
+        final Cluster cluster = BUILDER.create();
+        final GraphTraversalSource g = traversal().withRemote(DriverRemoteConnection.using(cluster));
+
+        System.out.println("CONNECTED TO GRAPH; ADDING ELEMENTS");
+        // Add 2 vertices and an edge between them with 2 properties each
+        Vertex v1 = g.addV("V1")
+            .property("vp1", "vpv1")
+            .property("vp2", "vpv2")
+            .next();
+
+        Vertex v2 = g.addV("V2")
+            .property("vp1", "vpv3")
+            .property("vp2", "vpv4")
+            .next();
+
+        g.addE("connects").from(v1).to(v2)
+            .property("ep1", "ev1")
+            .property("ep2", "ev2")
+            .iterate();
+
+        System.out.println("READING BACK DATA...");
+
+        Edge edge =  g.E().hasLabel("connects").next();
+        System.out.print("Edge: ");
+        System.out.println(edge);
+        System.out.print("Out from: ");
+        Vertex outV = edge.outVertex();
+        System.out.println(outV);
+        System.out.print("In to: ");
+        Vertex inV = edge.inVertex();
+        System.out.println(inV);
+
+        // List properties
+        v1 = g.V().hasLabel("V1").next();
+        System.out.println(v1 + " has Properties:");
+        v1.properties()
+            .forEachRemaining(property -> {
+                System.out.println(
+                    "--> " + property.key() + " : " + property.value()
+                );
+            });
+
+        // Clean up
+        g.V().drop().iterate();
+        System.out.print("DONE; ");
+        try {
+            System.out.println("CLOSING CONNECTION!");
+            cluster.close();
+        } catch (Exception e) {
+            System.err.println("FAILED TO CLOSE!");
+        }
+    }
+}