Summary

The toGenericString output does not include information about the bounds of type variables; this information should be included when type variables are declared in type or methods/constructors.

Problem

Relevant type information is omitted from the toGenericString output.

Solution

Adjust the spec and implementation to include the bounds when they are informative, meaning if a set of bounds of a type variable is just "extends Object", printing that is omitted since it is equivalent to not have an explicit bound.

Specification

--- old/src/java.base/share/classes/java/lang/Class.java    2018-10-11 17:46:31.940000000 -0700
+++ new/src/java.base/share/classes/java/lang/Class.java    2018-10-11 17:46:31.756000000 -0700
@@ -200,7 +200,8 @@
      * and {@code class}, {@code enum}, {@code interface}, or
      * <code>&#64;</code>{@code interface}, as appropriate), followed
      * by the type's name, followed by an angle-bracketed
-     * comma-separated list of the type's type parameters, if any.
+     * comma-separated list of the type's type parameters, if any,
+     * including informative bounds on the type parameters, if any.
      *
      * A space is used to separate modifiers from one another and to
      * separate any modifiers from the kind of type. The modifiers

--- old/src/java.base/share/classes/java/lang/reflect/Constructor.java  2018-10-11 17:46:32.364000000 -0700
+++ new/src/java.base/share/classes/java/lang/reflect/Constructor.java  2018-10-11 17:46:32.196000000 -0700
@@ -382,7 +382,8 @@
      * including type parameters.  The string is formatted as the
      * constructor access modifiers, if any, followed by an
      * angle-bracketed comma separated list of the constructor's type
-     * parameters, if any, followed by the fully-qualified name of the
+     * parameters, if any, including  informative bounds of the
+     * type parameters, if any, followed by the fully-qualified name of the
      * declaring class, followed by a parenthesized, comma-separated
      * list of the constructor's generic formal parameter types.
      *

--- old/src/java.base/share/classes/java/lang/reflect/Method.java   2018-10-11 17:46:33.184000000 -0700
+++ new/src/java.base/share/classes/java/lang/reflect/Method.java   2018-10-11 17:46:33.008000000 -0700
@@ -436,10 +436,11 @@
     }

     /**
-     * Returns a string describing this {@code Method}, including
-     * type parameters.  The string is formatted as the method access
+     * Returns a string describing this {@code Method}, including type
+     * parameters.  The string is formatted as the method access
      * modifiers, if any, followed by an angle-bracketed
      * comma-separated list of the method's type parameters, if any,
+     * including informative bounds of the type parameters, if any,
      * followed by the method's generic return type, followed by a
      * space, followed by the class declaring the method, followed by