Java8中Lamda表达式简介

import java.util.function.BinaryOperator;

public class LamdaStyle {

public static void main(String[] args) {
//1. 无参类型，用括号代替
Runnable noArguments = () -> System.err.println("Hello World");

//2. 无参多代码块类型，可以用花括号括起来
Runnable multiStatement = () -> {
System.err.println("Hello ");
System.err.println("World");
};

//3.一个参数，可以省略参数的括号
LamdaInterface oneArgument = greeting -> System.err.println(greeting);

//4.多个参数
BinaryOperator<Integer> add = (x,y) -> x+y;

//5.声明参数类型
BinaryOperator<Integer> addExplicit = (Integer x, Integer y) -> x+y;
}
}

interface LamdaInterface{

void say(String greeting);

}