Today we are going to study Java An important part of an engineer’s interview is often asked , It’s about containers , The so-called ten thousand feet tall buildings rise from the ground , So today, let’s learn Java What containers are there in ？

Java What are the containers in ？

Java The purpose of container class library is “ Save the object ”, And divide it into two different concepts ：
（1）Collection. A sequence of independent elements , These elements are subject to one or more rules .

（2）Map. One makes right “ Key value pair ” object , Allows you to use keys to find values .

I believe from these two pictures , We can clearly understand Java Container categories in , It is convenient for us to have more clear ideas in the later study , If you want to know more about , Please follow me to study , I’ll update in the post later , For your reference , If there is a mistake , Please leave a message in the comments section , Thank you very much , Tears on the watch . Thank you again for ！