collection lambdas added

classlevel/lambdaexpressions/collections/src/main/java/App.java

@@ -0,0 +1,17 @@
+import java.util.HashMap;
+import java.util.Map;
+
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+public class App {
+
+  public static void main(String[] args) {
+    Map<String, Integer> testlist = new HashMap<String, Integer>();
+    testlist.put("one", 1);
+    testlist.put("two", 2);
+    testlist.put("three", 3);
+    testlist.forEach((k, v) -> System.out.println(k + ":" + v));
+
+  }
+}

classlevel/lambdaexpressions/collections/src/test/java/AppTest.java

@@ -0,0 +1,12 @@
+/*
+ * This Java source file was generated by the Gradle 'init' task.
+ */
+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());
+    }
+}