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IntStream anyMatch() in Java with examples

  • Last Updated : 06 Dec, 2018

IntStream anyMatch(IntPredicate predicate) returns whether any 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 anyMatch(IntPredicate predicate)

Where, IntPredicate represents a predicate (boolean-valued function) 
of one int-valued argument and the function returns true if any 
elements of the stream match the provided predicate, 
otherwise false.

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

Example 1 : anyMatch() function to check whether any element in list satisfy given condition.




// Java code for IntStream anyMatch
// (Predicate predicate) to check whether
// any element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.IntStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Creating an IntStream
        IntStream stream = IntStream.of(1, 2, 3, 4, 5, 6);
  
        // Stream anyMatch(Predicate predicate)
        boolean answer = stream.anyMatch(num -> (num - 5) > 0);
  
        // Displaying the result
        System.out.println(answer);
    }
}

Output :

true

Example 2 : anyMatch() function to check whether square root of any element in stream is greater than 8.






// Java code for IntStream anyMatch
// (Predicate predicate) to check whether
// any element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.IntStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Creating an IntStream
        IntStream stream = IntStream.of(10, 20, 30, 40, 50);
  
        // Stream anyMatch(Predicate predicate)
        boolean answer = stream.anyMatch(num -> Math.sqrt(num) > 8);
  
        // Displaying the result
        System.out.println(answer);
    }
}

Output :

false

Example 3 : anyMatch() function to show that if the stream is empty then false is returned.




// Java code for IntStream anyMatch
// (Predicate predicate) to check whether
// any element of this stream match
// the provided predicate.
import java.util.*;
import java.util.stream.IntStream;
  
class GFG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Creating an empty IntStream
        IntStream stream = IntStream.empty();
  
        boolean answer = stream.anyMatch(num -> true);
  
        // Displaying the result
        System.out.println(answer);
    }
}

Output :

false

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