package com.wangzhen.algorithm.collection;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.Semaphore;


public class App {
//    public void test(List<String> list ){};
//    public void test(List<Integer> list ){};
    public static void main(String[] args) {
       // Collection
        List<?> list = new ArrayList<>();
        list.get(0);
        //list.add("name");
        //Semaphore;
    }
}
