Init repo

app/build.gradle

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+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details take a look at the 'Building Java & JVM projects' chapter in the Gradle
+ * User Manual available at https://docs.gradle.org/6.8.1/userguide/building_java_projects.html
+ */
+
+plugins {
+    // Apply the application plugin to add support for building a CLI application in Java.
+    id 'application'
+}
+
+repositories {
+    // Use JCenter for resolving dependencies.
+    jcenter()
+}
+
+dependencies {
+    // Use JUnit test framework.
+    testImplementation 'junit:junit:4.13'
+
+    // This dependency is used by the application.
+    implementation 'com.google.guava:guava:29.0-jre'
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = 'com.bartlomiejpluta.samplegame.App'
+}

app/src/main/java/com/bartlomiejpluta/samplegame/App.java

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+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package com.bartlomiejpluta.samplegame;
+
+public class App {
+    public String getGreeting() {
+        return "Hello World!";
+    }
+
+    public static void main(String[] args) {
+        System.out.println(new App().getGreeting());
+    }
+}

app/src/test/java/com/bartlomiejpluta/samplegame/AppTest.java

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+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+package com.bartlomiejpluta.samplegame;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class AppTest {
+    @Test public void testAppHasAGreeting() {
+        App classUnderTest = new App();
+        assertNotNull("app should have a greeting", classUnderTest.getGreeting());
+    }
+}