Java LongStream asDoubleStream()用法及代码示例

LongStream asDoubleStream()返回包含此流元素的DoubleStream，并将其转换为double。这是一个中间操作。在Stream实例上调用中间操作，并在完成处理后将中间实例作为输出提供。

用法:

DoubleStream asDoubleStream()

Where, DoubleStream is a sequence of 
primitive double-valued element.

返回值：LongStream asDoubleStream()返回包含此流元素的DoubleStream，并将其转换为double。

示例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

示例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

示例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：

相关用法

注：本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 LongStream asDoubleStream() in Java。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。