Java Supplier Interface

“ This interface does the opposite of the Consumer interface. So it doesn’t take anything as input but returns a value. “

Supplier has only one method which name is “ T get() ”

@FunctionalInterface
public interface Supplier<T> {
    T get();
}

And here is some examples about using

///# Example 1
Supplier<String> sayHello = () -> "Hello";
System.out.println(sayHello.get());
//Output : Hello

/* 
 * Create a random number generator with using Supplier
 */
Supplier<Integer> getRandomNumberBetween1And100 = () -> new SecureRandom().nextInt(100);
System.out.println(getRandomNumberBetween1And100.get());
//Output :  Random Number Between 1 and 100

In short, there are uses in this way..

Also there are auxiliary sub-interfaces in primitive types and boolean value.

BooleanSupplier: Returns a back boolean value.
IntSupplier: Returns an int value.
DoubleSupplier: Returns a double value.
LongSupplier: Returns a long value back.