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predefined functional interfaces and practice

Deepika Sahu answered on December 29, 2022 Popularity 2/10 Helpfulness 1/10

answer predefined functional interfaces and practice

related predefined functional interfaces

predefined functional interfaces and practice

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// A simple program to demonstrate the use
// of predicate interface
 
import java.util.*;
import java.util.function.Predicate;
 
class Test {
    public static void main(String args[])
    {
 
        // create a list of strings
        List<String> names = Arrays.asList(
            "Geek", "GeeksQuiz", "g1", "QA", "Geek2");
 
        // declare the predicate type as string and use
        // lambda expression to create object
        Predicate<String> p = (s) -> s.startsWith("G");
 
        // Iterate through the list
        for (String st : names) {
            // call the test method
            if (p.test(st))
                System.out.println(st);
        }
    }
}

Popularity 2/10 Helpfulness 1/10 Language java

Source: www.geeksforgeeks.org

Tags: java

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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predefined functional interfaces

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BiConsumer<T,U>	It represents an operation that accepts two input arguments and returns no result.
Consumer<T>	It represents an operation that accepts a single argument and returns no result.
Function<T,R>	It represents a function that accepts one argument and returns a result.
Predicate<T>	It represents a predicate (boolean-valued function) of one argument.
BiFunction<T,U,R>	It represents a function that accepts two arguments and returns a a result.
BinaryOperator<T>	It represents an operation upon two operands of the same data type. It returns a result of the same type as the operands.
BiPredicate<T,U>	It represents a predicate (boolean-valued function) of two arguments.
BooleanSupplier	It represents a supplier of boolean-valued results.
DoubleBinaryOperator	It represents an operation upon two double type operands and returns a double type value.
DoubleConsumer	It represents an operation that accepts a single double type argument and returns no result.
DoubleFunction<R>	It represents a function that accepts a double type argument and produces a result.
DoublePredicate	It represents a predicate (boolean-valued function) of one double type argument.
DoubleSupplier	It represents a supplier of double type results.
DoubleToIntFunction	It represents a function that accepts a double type argument and produces an int type result.
DoubleToLongFunction	It represents a function that accepts a double type argument and produces a long type result.
DoubleUnaryOperator	It represents an operation on a single double type operand that produces a double type result.
IntBinaryOperator	It represents an operation upon two int type operands and returns an int type result.
IntConsumer	It represents an operation that accepts a single integer argument and returns no result.
IntFunction<R>	It represents a function that accepts an integer argument and returns a result.
IntPredicate	It represents a predicate (boolean-valued function) of one integer argument.
IntSupplier	It represents a supplier of integer type.
IntToDoubleFunction	It represents a function that accepts an integer argument and returns a double.
IntToLongFunction	It represents a function that accepts an integer argument and returns a long.
IntUnaryOperator	It represents an operation on a single integer operand that produces an integer result.
LongBinaryOperator	It represents an operation upon two long type operands and returns a long type result.
LongConsumer	It represents an operation that accepts a single long type argument and returns no result.
LongFunction<R>	It represents a function that accepts a long type argument and returns a result.
LongPredicate	It represents a predicate (boolean-valued function) of one long type argument.
LongSupplier	It represents a supplier of long type results.
LongToDoubleFunction	It represents a function that accepts a long type argument and returns a result of double type.
LongToIntFunction	It represents a function that accepts a long type argument and returns an integer result.
LongUnaryOperator	It represents an operation on a single long type operand that returns a long type result.
ObjDoubleConsumer<T>	It represents an operation that accepts an object and a double argument, and returns no result.
ObjIntConsumer<T>	It represents an operation that accepts an object and an integer argument. It does not return result.
ObjLongConsumer<T>	It represents an operation that accepts an object and a long argument, it returns no result.
Supplier<T>	It represents a supplier of results.
ToDoubleBiFunction<T,U>	It represents a function that accepts two arguments and produces a double type result.
ToDoubleFunction<T>	It represents a function that returns a double type result.
ToIntBiFunction<T,U>	It represents a function that accepts two arguments and returns an integer.
ToIntFunction<T>	It represents a function that returns an integer.
ToLongBiFunction<T,U>	It represents a function that accepts two arguments and returns a result of long type.
ToLongFunction<T>	It represents a function that returns a result of long type.
UnaryOperator<T>	It represents an operation on a single operand that returnsa a result of the same type as its operand.

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Contributed on Jan 03 2023

Anjali Sharma

0 Answers Avg Quality 2/10

predefined functional interfaces

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interface Doable{  
    default void doIt(){  
        System.out.println("Do it now");  
    }  
}  
@FunctionalInterface  
interface Sayable extends Doable{  
    void say(String msg);   // abstract method  
}  
public class FunctionalInterfaceExample3 implements Sayable{  
    public void say(String msg){  
        System.out.println(msg);  
    }  
    public static void main(String[] args) {  
        FunctionalInterfaceExample3 fie = new FunctionalInterfaceExample3();  
        fie.say("Hello there");  
        fie.doIt();  
    }  
}

Popularity 4/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Dec 29 2022

Deepika Sahu

0 Answers Avg Quality 2/10

predefined functional interfaces and practice

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