src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/ParameterizedTypeImpl.java

*** 1,7 ****
  /*
!  * Copyright (c) 2003, 2013, 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.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2003, 2016, 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.  Oracle designates this
*** 31,40 ****
--- 31,41 ----
  import java.lang.reflect.Method;
  import java.lang.reflect.ParameterizedType;
  import java.lang.reflect.Type;
  import java.lang.reflect.TypeVariable;
  import java.util.Arrays;
+ import java.util.StringJoiner;
  import java.util.Objects;
  
  /** Implementing class for ParameterizedType interface. */
  
  public class ParameterizedTypeImpl implements ParameterizedType {
*** 205,218 ****
  
      public String toString() {
          StringBuilder sb = new StringBuilder();
  
          if (ownerType != null) {
!             if (ownerType instanceof Class)
!                 sb.append(((Class)ownerType).getName());
!             else
!                 sb.append(ownerType.toString());
  
              sb.append(".");
  
              if (ownerType instanceof ParameterizedTypeImpl) {
                  // Find simple name of nested type by removing the
--- 206,216 ----
  
      public String toString() {
          StringBuilder sb = new StringBuilder();
  
          if (ownerType != null) {
!             sb.append(ownerType.getTypeName());
  
              sb.append(".");
  
              if (ownerType instanceof ParameterizedTypeImpl) {
                  // Find simple name of nested type by removing the
*** 222,242 ****
              } else
                  sb.append(rawType.getName());
          } else
              sb.append(rawType.getName());
  
!         if (actualTypeArguments != null &&
!             actualTypeArguments.length > 0) {
!             sb.append("<");
!             boolean first = true;
              for(Type t: actualTypeArguments) {
!                 if (!first)
!                     sb.append(", ");
!                 sb.append(t.getTypeName());
!                 first = false;
              }
!             sb.append(">");
          }
  
          return sb.toString();
      }
  }
--- 220,236 ----
              } else
                  sb.append(rawType.getName());
          } else
              sb.append(rawType.getName());
  
!         if (actualTypeArguments != null) {
!             StringJoiner sj = new StringJoiner(", ", "<", ">");
!             sj.setEmptyValue("");
              for(Type t: actualTypeArguments) {
!                 sj.add(t.getTypeName());
              }
!             sb.append(sj.toString());
          }
  
          return sb.toString();
      }
  }