DoubleStream count() in Java with examples
DoubleStream count() returns the count of elements in the stream. DoubleStream count() is present in java.util.stream.DoubleStream. This is a special case of a reduction i.e, it takes a sequence of input elements and combines them into a single summary result.
Syntax :
long count()
Note : This is a terminal operation i.e, it may traverse the stream to produce a result or a side-effect. After the terminal operation is performed, the stream pipeline is considered consumed, and can no longer be used.
Example 1 : Count the elements in DoubleStream.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
public static void main(String[] args)
{
DoubleStream stream = DoubleStream.of( 2.3 , 3.4 , 4.5 ,
5.6 , 6.7 , 7.8 , 8.9 );
long total = stream.count();
System.out.println(total);
}
}
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Example 2 : Count distinct elements in DoubleStream.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
public static void main(String[] args)
{
DoubleStream stream = DoubleStream.of( 2.2 , 3.3 , 4.4 ,
4.4 , 7.6 , 7.6 , 8.0 );
long total = stream.distinct().count();
System.out.println(total);
}
}
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Last Updated :
06 Dec, 2018
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