JAVALambda表达式与函数式接口详解

public class Lambda {
    public static void main(String[] args) {
        Gog gog = new Gog() {
            @Override
            public void say() {
                System.out.println("WOW");
            }
        };
        gog.say();
    }
}

interface Gog {
    void say();
}

public class Lambda {
    public static void main(String[] args) {
    	//Lambda表达式的写法即： ()-> {函数实现} 当函数实现只有一行代码时，可以省略大括号 如下所示：
        Gog gog = () -> System.out.println("WOW");
        gog.say();
    }
}

interface Gog {
    void say();
}

//1.供给型接口：Interface Supplier<T>没有参数，有返回值
interface Supplier {
    String say();
}

//2.消费型接口：Interface Consumer<T>只有输入，没有返回值
interface Consumer{
    void say(String name);
}

//3.断定型接口：Interface Predicate<T>传入参数t,返回值类型为boolean类型
interface Predicate{
    boolean say(String name);
}

//4.函数型接口：Interface Function<T,R>传入参数类型为T，返回值类型为R
interface Function{
    String say(int age);
}

public class MyThread {

    public static void main(String[] args) {
        new Thread(() -> {
            System.out.println("创建线程");
        }).start();
    }
}

public class Lambda {
    public static void main(String[] args) {
        Supplier supplier = ()-> "wow";
        System.out.println(supplier.say());
    }
}

interface Supplier {

    String say();
   
    default String name(){
        return "";
    }
}