You use this library to generate a random number and insert the number into an a. ... Add the following code to the top of your file:import java.util.Random; Create a random number.

Function<Integer, String> functionClass = new FunctionClass(); System.out.println(functionClass.apply(2)); When you run the above code, the output would be four. Java Function interface example.

Java Supplier interface tutorial. As you can see, the code for the class that implements Java’s Supplier interface is fairly simple. The only requirements are the class declaration and the ...