Java 常用的內建 Functional Interface

Consumer

```java= public interface Consumer { void accept(T t); }

## Function<T,R>
```java=
public interface Function<T, R> {
    R apply(T t);
}

Predicate

```java= public interface Predicate { boolean test(T t); }

## Supplier<T>
```java=
public interface Supplier<T> {

    T get();
}

tags: java