ms-Shifu

## Lambda_using default methods
public class Test3 {
    public static void main(String[] args) {
        Formula<Formula> formula = a -> a.sqrt(100);

        System.out.println(formula.calculate(new ImplFormula(100)));
    }
}

@FunctionalInterface
interface Formula<T> {

## application.properties
spring.freemarker.expose-request-attributes=true

## pom.xml_Freemarker
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
	public class Test3 {
	public static void main(String[] args) {
	Formula<Formula> formula = a -> a.sqrt(100);

	System.out.println(formula.calculate(new ImplFormula(100)));
	}
	}

	@FunctionalInterface
	interface Formula<T> {
	<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-freemarker</artifactId>
	</dependency>