--- old/src/java.base/share/classes/java/lang/reflect/Executable.java	2018-10-11 17:46:32.772000000 -0700
+++ new/src/java.base/share/classes/java/lang/reflect/Executable.java	2018-10-11 17:46:32.600000000 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2018, 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
@@ -135,6 +135,19 @@
      */
     abstract void specificToStringHeader(StringBuilder sb);
 
+    String typeVarBounds(TypeVariable<?> typeVar) {
+	Type[] bounds = typeVar.getBounds();
+	if (bounds.length == 1 && bounds[0].equals(Object.class)) {
+	    return typeVar.getName();
+	} else {
+	    StringJoiner sj = new StringJoiner(" & ");
+	    for (Type bound : bounds) {
+		sj.add(bound.getTypeName());
+	    }
+	    return typeVar.getName() + " extends " + sj.toString();
+	}
+    }
+
     String sharedToGenericString(int modifierMask, boolean isDefault) {
         try {
             StringBuilder sb = new StringBuilder();
@@ -145,7 +158,7 @@
             if (typeparms.length > 0) {
                 StringJoiner sj = new StringJoiner(",", "<", "> ");
                 for(TypeVariable<?> typeparm: typeparms) {
-                    sj.add(typeparm.getTypeName());
+                    sj.add(typeVarBounds(typeparm));
                 }
                 sb.append(sj.toString());
             }