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src/java.base/share/classes/java/util/Optional.java

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*** 1,7 **** /* ! * Copyright (c) 2012, 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) 2012, 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
*** 158,167 **** --- 158,177 ---- public boolean isPresent() { return value != null; } /** + * If a value is not present, returns {@code true}, otherwise + * {@code false}. + * + * @return {@code true} if a value is not present, otherwise {@code false} + */ + public boolean isEmpty() { + return value == null; + } + + /** * If a value is present, performs the given action with the value, * otherwise does nothing. * * @param action the action to be performed, if a value is present * @throws NullPointerException if value is present and the given action is
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