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* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* @bug 4160204 4234488
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* @summary Create empty javadoc comments and verify that javac does not crash.
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* @compile EmptyDocComments.java
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// WARNING: This file intentionally contains whitespace characters at the end of
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// some lines. Do not delete them!
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// If this file fails to compile, then the test has failed. The test does not
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public class EmptyDocComments
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public static void Main(String [] args)
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// Verify that empty doc comments don't cause a crash.
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public static void emptyDocComment0()
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System.out.println("javadoc comment");
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System.out.println("- contains whitespace");
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System.out.println("- ends on same line as potential comment");
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public static void emptyDocComment1()
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System.out.println("javadoc comment");
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System.out.println("- contains nothing");
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System.out.println("- ends on same line as potential comment");
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public static void emptyDocComment2()
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System.out.println("javadoc comment");
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System.out.println("- contains whitespace");
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System.out.println("- ends on same line as comment start");
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public static void emptyDocComment3()
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System.out.println("javadoc comment");
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System.out.println("- contains whitespace");
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System.out.println("- ends on new line ");
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public static void emptyDocComment4()
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System.out.println("minimal javadoc comment");
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System.out.println("- contains nothing");
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System.out.println("- ends on same line as comment start");
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public static void emptyDocComment5()
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System.out.println("minimal _java_ comment");
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System.out.println("- contains nothing");
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System.out.println("- ends on same line as comment start");
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public static void emptyDocComment6()
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System.out.println("javadoc comment");
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System.out.println("- contains \"*\"");
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System.out.println("- ends on same line as comment start");
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// Verify that we properly handle very small, non-empty comments.
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public static void singleChar0()
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System.out.println("javadoc comment");
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System.out.println("- contains a single character");
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System.out.println("- ends on same line as comment start");
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public static void singleChar1()
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System.out.println("javadoc comment");
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System.out.println("- contains a single character and trailing whitespace");
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System.out.println("- ends on same line as potential comment");
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public static void singleChar2()
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System.out.println("javadoc comment");
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System.out.println("- contains a single character, no trailing whitespace");
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System.out.println("- ends on new line ");
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public static void singleChar3()
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System.out.println("javadoc comment");
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System.out.println("- contains a single character and trailing whitespace");
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System.out.println("- ends on new line ");