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src/java.base/share/classes/java/io/FilterOutputStream.java
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 1994, 2017, Oracle and/or its affiliates. All rights reserved.
+ * 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
@@ -65,10 +65,14 @@
* the field {@code this.out} for later use, or
* <code>null</code> if this instance is to be
* created without an underlying stream.
*/
public FilterOutputStream(OutputStream out) {
+ if (out == null) {
+ throw new NullPointerException();
+ }
+
this.out = out;
}
/**
* Writes the specified <code>byte</code> to this output stream.
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