Add OkHttp GetExample with Maven project structure

.gitignore

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+# Java
+*.class
+*.jar
+*.war
+*.ear
+
+# Maven
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+
+# IDE
+.idea/
+*.iml
+*.iws
+*.ipr
+.vscode/
+.settings/
+.project
+.classpath
+
+# OS
+.DS_Store
+Thumbs.db

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>nl.alfazetoperations</groupId>
+    <artifactId>okhttp-samples</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>OkHttp Samples</name>
+    <description>OkHttp sample code examples</description>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <okhttp.version>4.12.0</okhttp.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.squareup.okhttp3</groupId>
+            <artifactId>okhttp</artifactId>
+            <version>${okhttp.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <sourceDirectory>samples/guide/src/main/java</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.11.0</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

samples/guide/src/main/java/okhttp3/guide/GetExample.java

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+/*
+ * Copyright (C) 2013 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package okhttp3.guide;
+
+import java.io.IOException;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+
+public class GetExample {
+  final OkHttpClient client = new OkHttpClient();
+
+  String run(String url) throws IOException {
+    Request request = new Request.Builder()
+        .url(url)
+        .build();
+
+    try (Response response = client.newCall(request).execute()) {
+      if (response.body() == null) {
+        throw new IOException("Response body is null");
+      }
+      return response.body().string();
+    }
+  }
+
+  public static void main(String[] args) throws IOException {
+    GetExample example = new GetExample();
+    String response = example.run("https://raw.githubusercontent.com/square/okhttp/master/README.md");
+    System.out.println(response);
+  }
+}