DoubleStream distinct() is a method in java.util.stream.DoubleStream. This method returns a stream consisting of the distinct elements. This is a stateful intermediate operation i.e, it may incorporate state from previously seen elements when processing new elements. They may need to process the entire input before producing a result. For example, one cannot produce any results from sorting a stream until one has seen all elements of the stream.
Syntax :
DoubleStream distinct() Where, DoubleStream is a sequence of primitive long-valued elements.
Example 1 : Printing distinct elements of Double stream.
// Java code for DoubleStream distinct() import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating a stream
DoubleStream stream = DoubleStream.of( 2.2 , 3.3 , 3.3 ,
5.6 , 6.7 , 6.7 , 8.0 );
// Displaying only distinct elements
// using the distinct() method
stream.distinct().forEach(System.out::println);
}
} |
Output :
2.2 3.3 5.6 6.7 8.0
Example 2 : Counting value of distinct elements in a Double stream.
// Java code for DoubleStream distinct() method // to count the number of distinct // elements in given stream import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
// Driver code
public static void main(String[] args)
{
// creating a stream
DoubleStream stream = DoubleStream.of( 2.2 , 3.3 , 3.3 ,
5.6 , 6.7 , 6.7 , 8.0 );
// storing the count of distinct elements
// in a variable named total
long total = stream.distinct().count();
// displaying the total number of elements
System.out.println(total);
}
} |
Output :
5