Java 9 Example

java-9/com.javadevjournal.httpclient/src/com/javadevjournal/httpclient/HTTPClient.java

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+package com.javadevjournal.httpclient;
+
+import jdk.incubator.http.HttpClient;
+import jdk.incubator.http.HttpHeaders;
+import jdk.incubator.http.HttpRequest;
+import jdk.incubator.http.HttpResponse;
+
+import java.io.IOException;
+import java.net.*;
+import java.util.concurrent.CompletableFuture;
+
+import static jdk.incubator.http.HttpResponse.BodyHandler.asString;
+
+public class HTTPClient {
+
+    public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException {
+
+        byte[] requestBody ="This is expected to be sent back as part of response body".getBytes();
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create("https://postman-echo.com/post")).POST(HttpRequest.BodyProcessor.fromString("This is expected to be sent back as part of response body"))
+                .build();
+
+        HttpResponse<String> response= client.send(request, HttpResponse.BodyHandler.asString());
+        System.out.println(response.statusCode());
+       if(response.statusCode() == 200){
+           System.out.println(response.version());
+           //process business logic
+       }
+    }
+}

java-9/com.javadevjournal.httpclient/src/module-info.java

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+module com.javadevjournal.httpclient {
+    requires jdk.incubator.httpclient;
+}

java-9/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>com.javadevjournal</groupId>
+    <artifactId>java-9</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>1.9</maven.compiler.source>
+        <maven.compiler.target>1.9</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <junit.version>4.12</junit.version>
+        <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
+        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>core-java-9</finalName>
+
+        <plugins>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
+            </plugin>
+
+        </plugins>
+
+    </build>
+</project>

java-9/src/main/java/hello/Greeter.java

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+package hello;
+
+public class Greeter {
+	public String sayHello() {
+		return "Hello world!";
+	}
+}

java-9/src/main/java/hello/HelloWorld.java

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+package hello;
+
+import org.joda.time.LocalTime;
+
+public class HelloWorld {
+	public static void main(String[] args) {
+		LocalTime currentTime = new LocalTime();
+		System.out.println("The current local time is: " + currentTime);
+		Greeter greeter = new Greeter();
+		System.out.println(greeter.sayHello());
+	}
+}

java-9/src/test/java/hello/GreeterTest.java

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+package hello;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class GreeterTest {
+	
+	private Greeter greeter = new Greeter();
+
+	@Test
+	public void greeterSaysHello() {
+		assertThat(greeter.sayHello(), containsString("Hello"));
+	}
+
+}