6968063: provide examples of code that generate diagnostics

Reviewed-by: mcimadamore

langtools/test/tools/javac/diags/examples/UncheckedMethodInvocation.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// key: compiler.warn.unchecked.meth.invocation.applied
+// key: compiler.warn.prob.found.req
+// key: compiler.misc.unchecked.assign
+// options: -Xlint:unchecked
+
+class UncheckedMethodInvocation {
+    class X<T> {}
+
+    public <T> void m(X<T> x, T t) {}
+
+    public void test() {
+        m(new X<X<Integer>>(), new X());
+    }
+}