DoubleStream noneMatch() in Java with examples

DoubleStream noneMatch(DoublePredicate predicate) returns whether no elements of this stream match the provided predicate. It may not evaluate the predicate on all elements if not necessary for determining the result. This is a short-circuiting terminal operation. A terminal operation is short-circuiting if, when presented with infinite input, it may terminate in finite time.
Syntax :

boolean noneMatch(DoublePredicate predicate)

Where, DoublePredicate represents a predicate 
(boolean-valued function) of one double-valued argument.

Return Value : The function returns true if either all elements of the stream match the provided predicate or the stream is empty, otherwise false.

Note : If the stream is empty then true is returned and the predicate is not evaluated.



Example 1 : noneMatch() function to check whether no element of DoubleStream is divisible by 5.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code for DoubleStream noneMatch
// (DoublePredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.DoubleStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an DoubleStream
        DoubleStream stream =
              DoubleStream.of(3.2, 5.0, 9.3, 12.4, 14.7);
  
        // Check if no element of stream
        // is divisible by 5 using
        // DoubleStream noneMatch(DoublePredicate predicate)
        boolean answer =
             stream.noneMatch(num -> num % 5 == 0);
  
        // Displaying the result
        System.out.println(answer);
    }
}

chevron_right


Output:

false

Example 2 : noneMatch() function to check whether no element in the DoubleStream obtained after concatenating two DoubleStreams is less than 2.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code for DoubleStream noneMatch
// (DoublePredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.DoubleStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an DoubleStream after
        // concatenating two DoubleStreams
        DoubleStream stream = DoubleStream.concat(
            DoubleStream.of(3.3, 4.2, 5.1, 6.6),
            DoubleStream.of(7.2, 8.3, 9.1, 10.5));
  
        // Check if no element of stream
        // is less than 2 using
        // DoubleStream noneMatch(DoublePredicate predicate)
        boolean answer = stream.noneMatch(num -> num < 2);
  
        // Displaying the result
        System.out.println(answer);
    }
}

chevron_right


Output:

true

Example 3 : noneMatch() function to show if the stream is empty then true is returned.

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code for DoubleStream noneMatch
// (DoublePredicate predicate) to check whether
// no element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.DoubleStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
        // Creating an empty DoubleStream
        DoubleStream stream = DoubleStream.empty();
  
        // Using DoubleStream noneMatch() on empty stream
        boolean answer = stream.noneMatch(num -> true);
  
        // Displaying the result
        System.out.println(answer);
    }
}

chevron_right


Output:

true


My Personal Notes arrow_drop_up

In love with a semicolon because sometimes i miss it so badly)

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.