Be the compiler

package ch10c;

import java.util.function.Consumer;

import java.util.function.Function;

import java.util.function.Supplier;

public class BeTheCompiler {

  public static void main(String[] args) {

    Runnable runnable = () -> System.out.println("Hi!");

    Consumer<String> consumer = s -> System.out.println(s);

    Function<String, Integer> function = s -> s.length();

    Supplier<String> supplier = () -> "Some string";

  }

}