java中Collections.addAll方法具有什么功能呢？

Collections.addAll方法简介

Collections.addAll方法
    是java.util包下面Collections类中的方法
Collections.addAll方法的功能:
    向一个list中添加数据
	其可实现的效果为:
	  一次添加多个元素

  ArrayList<String> list = new ArrayList<>();
        Collections.addAll(list, "maomao", "java265", "xiaoxiao", "other", "秦铭铭");

  String[] arr = {"maomao", "java265", "xiaoxiao", "other", "秦铭铭"};
        ArrayList<String> list = new ArrayList<>();
        Collections.addAll(list, arr);

  String[] arr = {"maomao", "java265", "xiaoxiao", "other", "秦铭铭"};
        ArrayList<String> list = new ArrayList<>();
        list.addAll(Arrays.asList(arr));
 
// 或
 String[] arr = {"maomao", "java265", "xiaoxiao", "other", "秦铭铭"};
        ArrayList<String> list = new ArrayList<>(Arrays.asList(arr));