Java 8 Functional Interface With Example

Java 8 Functional Interface With Example

1-Interface BiPredicate<T,U> vs Interface Predicate<T>
2-Function VS BiFunction
3-Consumer VS BiConsumer
4-Supplier

BiPredicate<T,U> vs Predicate<T>

Predicate<T>:

• This interface represents a predicate, which is a boolean-valued function of one argument. It’s commonly used for filtering collections or testing conditions.
• Example: Predicate<String> can be used to test if a string starts with "A".
• Syntax: @FunctionalInterface public interface Predicate<T> { boolean test(T t);

import java.util.function.Predicate;

public class PredicateExample {
    public static void main(String[] args) {
        Predicate<String> startsWithA = str -> str.startsWith("A");
        
        System.out.println(startsWithA.test("Apple")); // Output: true
        System.out.println(startsWithA.test("Banana")); // Output: false
    }
}

BiPredicate<T, U>:

• This interface is similar to Predicate, but it takes two arguments. It represents a predicate which accepts two arguments and returns a boolean result.
• Example: BiPredicate<Integer, Integer> can be used to test if one integer is greater than another.