src/share/classes/java/io/ObjectOutputStream.java

*** 1,7 ****
  /*
!  * Copyright (c) 1996, 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) 1996, 2014, 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
*** 30,39 ****
--- 30,40 ----
  import java.security.AccessController;
  import java.security.PrivilegedAction;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
+ import java.util.StringJoiner;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  import static java.io.ObjectStreamClass.processQueue;
  import sun.reflect.misc.ReflectUtil;
  
*** 2463,2480 ****
  
          /**
           * Returns a string representation of this object
           */
          public String toString() {
!             StringBuilder buffer = new StringBuilder();
!             if (!stack.isEmpty()) {
!                 for(int i = stack.size(); i > 0; i-- ) {
!                     buffer.append(stack.get(i - 1));
!                     if (i != 1)
!                         buffer.append('\n');
                  }
!             }
!             return buffer.toString();
          }
      }
  
  }
--- 2464,2477 ----
  
          /**
           * Returns a string representation of this object
           */
          public String toString() {
!             StringJoiner sj = new StringJoiner("\n");
!             for (int i = stack.size() - 1; i >= 0; i--) {
!                 sj.add(stack.get(i));
              }
!             return sj.toString();
          }
      }
  
  }