src/java.desktop/share/classes/java/awt/FileDialog.java

*** 1,7 ****
  /*
!  * Copyright (c) 1995, 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
   * 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) 1995, 2019, 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
*** 442,452 ****
       *
       * @param     dir   the specified directory
       * @see       java.awt.FileDialog#getDirectory
       */
      public void setDirectory(String dir) {
!         this.dir = (dir != null && dir.equals("")) ? null : dir;
          FileDialogPeer peer = (FileDialogPeer)this.peer;
          if (peer != null) {
              peer.setDirectory(this.dir);
          }
      }
--- 442,452 ----
       *
       * @param     dir   the specified directory
       * @see       java.awt.FileDialog#getDirectory
       */
      public void setDirectory(String dir) {
!         this.dir = (dir != null && dir.isEmpty()) ? null : dir;
          FileDialogPeer peer = (FileDialogPeer)this.peer;
          if (peer != null) {
              peer.setDirectory(this.dir);
          }
      }
*** 522,532 ****
       * @param    file   the file being set
       * @see      #getFile
       * @see      #getFiles
       */
      public void setFile(String file) {
!         this.file = (file != null && file.equals("")) ? null : file;
          FileDialogPeer peer = (FileDialogPeer)this.peer;
          if (peer != null) {
              peer.setFile(this.file);
          }
      }
--- 522,532 ----
       * @param    file   the file being set
       * @see      #getFile
       * @see      #getFiles
       */
      public void setFile(String file) {
!         this.file = (file != null && file.isEmpty()) ? null : file;
          FileDialogPeer peer = (FileDialogPeer)this.peer;
          if (peer != null) {
              peer.setFile(this.file);
          }
      }
*** 603,616 ****
          throws ClassNotFoundException, IOException
      {
          s.defaultReadObject();
  
          // 1.1 Compatibility: "" is not converted to null in 1.1
!         if (dir != null && dir.equals("")) {
              dir = null;
          }
!         if (file != null && file.equals("")) {
              file = null;
          }
      }
  
      /**
--- 603,616 ----
          throws ClassNotFoundException, IOException
      {
          s.defaultReadObject();
  
          // 1.1 Compatibility: "" is not converted to null in 1.1
!         if (dir != null && dir.isEmpty()) {
              dir = null;
          }
!         if (file != null && file.isEmpty()) {
              file = null;
          }
      }
  
      /**