8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/lambdaExpression/AbstractClass_neg.java

@@ -0,0 +1,18 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *   Test that lambda conversion is only for SAM interface, not abstract class
+ * @compile/fail/ref=AbstractClass_neg.out -XDrawDiagnostics AbstractClass_neg.java
+ */
+
+public class AbstractClass_neg {
+
+    abstract class SAM {
+        abstract int m();
+    }
+
+    void test() {
+        SAM s = ()-> 6;
+    }
+}