DoubleStream anyMatch() in Java with examples
Last Updated :
06 Dec, 2018
DoubleStream anyMatch(DoublePredicate 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(DoublePredicate predicate)
Parameters :
- DoublePredicate : A predicate (boolean-valued function) of one double-valued argument.
Return Value : 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.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
public static void main(String[] args)
{
DoubleStream stream = DoubleStream.of( 1.2 , 2.3 ,
3.4 , 4.5 , 5.6 , 6.7 );
boolean answer = stream.anyMatch(num -> (num - 5 ) > 0 );
System.out.println(answer);
}
}
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Example 2 : anyMatch() function to check whether square root of any element in stream is greater than 8.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
public static void main(String[] args)
{
DoubleStream stream = DoubleStream.of( 10.3 , 20.4 , 30.5 ,
40.9 , 50.4 );
boolean answer = stream.anyMatch(num -> Math.sqrt(num) > 8 );
System.out.println(answer);
}
}
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Example 3 : anyMatch() function to show that if the stream is empty then false is returned.
import java.util.*;
import java.util.stream.DoubleStream;
class GFG {
public static void main(String[] args)
{
DoubleStream stream = DoubleStream.empty();
boolean answer = stream.anyMatch(num -> true );
System.out.println(answer);
}
}
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