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LongStream asDoubleStream() in Java

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LongStream asDoubleStream() returns a DoubleStream consisting of the elements of this stream, converted to double. This is an intermediate operation. Intermediate operations are invoked on a Stream instance and after they finish their processing, they give a Stream instance as output. Syntax :
DoubleStream asDoubleStream()

Where, DoubleStream is a sequence of 
primitive double-valued element.
Return Value : LongStream asDoubleStream() returns a DoubleStream consisting of the elements of this stream, converted to double. Example 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);
    }
}

                    
Output :
3.0
5.0
9.0
12.0
14.0
Example 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);
    }
}

                    
Output :
3.0
4.0
5.0
6.0
7.0
Example 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);
    }
}

                    
Output :
3
3.0
4
4.0
5
5.0
6
6.0
7
7.0


Last Updated : 06 Dec, 2018
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