本文整理匯總了Java中java.util.stream.DoubleStream.empty方法的典型用法代碼示例。如果您正苦於以下問題：Java DoubleStream.empty方法的具體用法？Java DoubleStream.empty怎麽用？Java DoubleStream.empty使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類java.util.stream.DoubleStream的用法示例。
在下文中一共展示了DoubleStream.empty方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: stream
import java.util.stream.DoubleStream; //導入方法依賴的package包/類
/**
* If a value is present, returns a sequential {@link DoubleStream}
* containing only that value, otherwise returns an empty
* {@code DoubleStream}.
*
* @apiNote
* This method can be used to transform a {@code Stream} of optional doubles
* to a {@code DoubleStream} of present doubles:
* <pre>{@code
* Stream<OptionalDouble> os = ..
* DoubleStream s = os.flatMapToDouble(OptionalDouble::stream)
* }</pre>
*
* @return the optional value as a {@code DoubleStream}
* @since 9
*/
public DoubleStream stream() {
if (isPresent) {
return DoubleStream.of(value);
} else {
return DoubleStream.empty();
}
}
示例2: stream
import java.util.stream.DoubleStream; //導入方法依賴的package包/類
/**
* If a value is present in {@code optional}, returns a stream containing only that element,
* otherwise returns an empty stream.
*
* <p><b>Java 9 users:</b> use {@code optional.stream()} instead.
*/
public static DoubleStream stream(OptionalDouble optional) {
return optional.isPresent() ? DoubleStream.of(optional.getAsDouble()) : DoubleStream.empty();
}