src/java.base/share/classes/java/lang/Class.java

*** 270,281 ****
                  sb.append(getName());
              }
  
              TypeVariable<?>[] typeparms = component.getTypeParameters();
              if (typeparms.length > 0) {
!                 sb.append(Stream.of(typeparms).map(Class::typeVarBounds).
!                           collect(Collectors.joining(",", "<", ">")));
              }
  
              for (int i = 0; i < arrayDepth; i++)
                  sb.append("[]");
  
--- 270,282 ----
                  sb.append(getName());
              }
  
              TypeVariable<?>[] typeparms = component.getTypeParameters();
              if (typeparms.length > 0) {
!                 sb.append(Arrays.stream(typeparms)
!                           .map(Class::typeVarBounds)
!                           .collect(Collectors.joining(",", "<", ">")));
              }
  
              for (int i = 0; i < arrayDepth; i++)
                  sb.append("[]");
  
*** 287,298 ****
          Type[] bounds = typeVar.getBounds();
          if (bounds.length == 1 && bounds[0].equals(Object.class)) {
              return typeVar.getName();
          } else {
              return typeVar.getName() + " extends " +
!                 Stream.of(bounds).map(Type::getTypeName).
!                 collect(Collectors.joining(" & "));
          }
      }
  
      /**
       * Returns the {@code Class} object associated with the class or
--- 288,300 ----
          Type[] bounds = typeVar.getBounds();
          if (bounds.length == 1 && bounds[0].equals(Object.class)) {
              return typeVar.getName();
          } else {
              return typeVar.getName() + " extends " +
!                 Arrays.stream(bounds)
!                 .map(Type::getTypeName)
!                 .collect(Collectors.joining(" & "));
          }
      }
  
      /**
       * Returns the {@code Class} object associated with the class or
*** 3417,3428 ****
       */
      private String methodToString(String name, Class<?>[] argTypes) {
          StringBuilder sb = new StringBuilder();
          sb.append(getName() + "." + name + "(");
          if (argTypes != null) {
!             sb.append(Stream.of(argTypes).map(c -> {return (c == null) ? "null" : c.getName();}).
!                       collect(Collectors.joining(",")));
          }
          sb.append(")");
          return sb.toString();
      }
  
--- 3419,3431 ----
       */
      private String methodToString(String name, Class<?>[] argTypes) {
          StringBuilder sb = new StringBuilder();
          sb.append(getName() + "." + name + "(");
          if (argTypes != null) {
!             sb.append(Arrays.stream(argTypes)
!                       .map(c -> (c == null) ? "null" : c.getName())
!                       .collect(Collectors.joining(",")));
          }
          sb.append(")");
          return sb.toString();
      }