Java 中的 LongStream asDoubleStream()
原文:https://www . geesforgeks . org/longstream-as double stream-Java/
LongStream as double stream()返回一个由该流的元素组成的 DoubleStream ，转换为 double。这是一个 的中级操作。 在流实例上调用中间操作，在它们完成处理后，它们给出一个流实例作为输出。
语法:
DoubleStream asDoubleStream()
Where, DoubleStream is a sequence of
primitive double-valued element.
返回值: LongStream asDoubleStream()返回由该流的元素组成的 DoubleStream，转换为 double。
例 1 :
// Java code for DoubleStream asDoubleStream()
// to return a DoubleStream consisting of
// the elements of this stream
import java.util.*;
import java.util.stream.LongStream;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating a LongStream
LongStream stream = LongStream.of(3L, 5L, 9L, 12L, 14L);
// Using DoubleStream asDoubleStream()
DoubleStream stream1 = stream.asDoubleStream();
// Displaying DoubleStream consisting of
// the elements of this stream
stream1.forEach(System.out::println);
}
}
输出:
3.0
5.0
9.0
12.0
14.0
例 2 :
// Java code for DoubleStream asDoubleStream()
// to return a DoubleStream consisting of
// the elements of this stream
import java.util.*;
import java.util.stream.LongStream;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating an LongStream and using asDoubleStream()
DoubleStream stream = LongStream.range(3L, 8L)
.asDoubleStream();
// Displaying DoubleStream consisting of
// the elements of this stream
stream.forEach(System.out::println);
}
}
输出:
3.0
4.0
5.0
6.0
7.0
例 3 :
// Java code for DoubleStream asDoubleStream()
// to return a DoubleStream consisting of
// the elements of this stream
import java.util.*;
import java.util.stream.LongStream;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// Creating a LongStream and using asDoubleStream()
// to display the elements of LongStream and
// DoubleStream together
DoubleStream stream = LongStream.range(3L, 8L)
.peek(System.out::println)
.asDoubleStream();
// Displaying DoubleStream consisting of
// the elements of this stream
stream.forEach(System.out::println);
}
}
输出:
3
3.0
4
4.0
5
5.0
6
6.0
7
7.0
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