Supplier Functional Interface

Supplier is an interface that does not take in any argument but produces a value when the get() function is invoked. Suppliers are useful when we don’t need to supply any value and obtain a result at the same time.

Below are some of the functional interfaces, which can be categorized as a supplier.

Interface Name	Description	Abstract Method
Supplier<T>	Represents a supplier of results (reference type)	T get()
DoubleSupplier	A supplier of double-value results	double getAsDouble()
IntSupplier	A supplier of int-value results	int getAsInt()
LongSupplier	A supplier of long-value results	long getAsLong()
BooleanSupplier	A supplier of boolean-value results	boolean getAsBoolean()