src/java.base/share/classes/java/io/FilterInputStream.java

*** 1,7 ****
  /*
!  * Copyright (c) 1994, 2017, 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) 1994, 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
*** 57,66 ****
--- 57,69 ----
       *
       * @param   in   the underlying input stream, or <code>null</code> if
       *          this instance is to be created without an underlying stream.
       */
      protected FilterInputStream(InputStream in) {
+         if (in == null) {
+             throw new NullPointerException();
+         }
          this.in = in;
      }
  
      /**
       * Reads the next byte of data from this input stream. The value