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1   /*
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3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
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7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
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24   */
25  package java.util.function;
26  
27  import java.util.Objects;
28  
29  /**
30   * Represents an operation that accepts a single {@code int}-valued argument and
31   * returns no result.  This is the primitive type specialization of
32   * {@link Consumer} for {@code int}.  Unlike most other functional interfaces,
33   * {@code IntConsumer} is expected to operate via side-effects.
34   *
35   * <p>This is a <a href="package-summary.html">functional interface</a>
36   * whose functional method is {@link #accept(int)}.
37   *
38   * @see Consumer
39   * @since 1.8
40   */
41  @FunctionalInterface
42  public interface IntConsumer {
43  
44      /**
45       * Performs this operation on the given argument.
46       *
47       * @param value the input argument
48       */
49      void accept(int value);
50  
51      /**
52       * Returns a composed {@code IntConsumer} that performs, in sequence, this
53       * operation followed by the {@code after} operation. If performing either
54       * operation throws an exception, it is relayed to the caller of the
55       * composed operation.  If performing this operation throws an exception,
56       * the {@code after} operation will not be performed.
57       *
58       * @param after the operation to perform after this operation
59       * @return a composed {@code IntConsumer} that performs in sequence this
60       * operation followed by the {@code after} operation
61       * @throws NullPointerException if {@code after} is null
62       */
63      default IntConsumer andThen(IntConsumer after) {
64          Objects.requireNonNull(after);
65          return (int t) -> { accept(t); after.accept(t); };
66      }
67  }