本文整理了Java中com.annimon.stream.Optional.filter()方法的一些代码示例，展示了Optional.filter()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Optional.filter()方法的具体详情如下：
包路径：com.annimon.stream.Optional
类名称：Optional
方法名：filter

Optional.filter介绍

[英]Performs filtering on inner value if it is present.
[中]对内部值（如果存在）执行过滤。

代码示例

代码示例来源：origin: aNNiMON/Lightweight-Stream-API

/**
 * Performs negated filtering on inner value if it is present.
 *
 * @param predicate  a predicate function
 * @return this {@code Optional} if the value is present and doesn't matches predicate,
 *              otherwise an empty {@code Optional}
 * @since 1.1.9
 */
public Optional<T> filterNot(Predicate<? super T> predicate) {
  return filter(Predicate.Util.negate(predicate));
}

代码示例来源：origin: aNNiMON/Lightweight-Stream-API

@Override
  public Optional<Integer> apply(Optional<Integer> optional) {
    return optional.filter(Functions.remainder(2));
  }
});

代码示例来源：origin: aNNiMON/Lightweight-Stream-API

@Test
public void testFilter() {
  Optional<Integer> result = Optional.of(10)
      .filter(Predicate.Util.negate(Functions.remainder(2)));
  assertThat(result, isEmpty());
}