Lambda表示式

import org.springframework.beans.factory.ObjectFactory;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class InterfaceMain {

    private static final Map<String, ObjectFactory<?>> map = new ConcurrentHashMap<>();

    User  addDate(){
        System.out.println("ceshi");
        return new User();
    }

    void test(){
        map.put("1",()->addDate());
    }
    public static void main(String[] args) {
        new InterfaceMain().test();
        System.out.println(map.get("1").getObject());
    }
}