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Google guava Guava is a supplement to the Java API. It implements the functions commonly used in java development more gracefully, making the coding easier and the code easier to understand. Guava uses a variety of design patterns and has undergone a lot of testing, which is favored by more and more development teams. The latest version of Jav ...

🔒 Quick navigation and articles related to this article 🔒 Basic use of set and mapClick through to the articleRed black treeClick through to the article Red black tree code We want to encapsulate the red black tree of KV model and simulate the implementation of set and map. The code used is as follows #include<iostream> using nam ...

Topic Title Link: https://www.luogu.com.cn/problem/P4428 General idea of the topic Count Reg n n n 0 / 1 0/1 0 / 1 string requires su ...

Set 1. Overview and characteristics A collection that does not contain duplicate elements. More specifically, set does not contain a set that satisfies e1 Equals (e2) has element pairs e1 and e2 and contains at most one null element.The data in the Set collection is out of order (because the Set collection has no subscript)Set does not al ...

1, Collection Features of collection class: it provides a storage type with variable storage space, and the stored data capacity can be changed at any time Collection collection overview Is the top-level interface of a single column Collection. It represents a set of objects, which are also called Collection elementsJDK does not provide an ...

Collection common interfaces and classes Collection in java is very important. It is both a container and a reference data type. There are many interfaces and classes related to collection. Regardless of concurrent, the most common are as follows: As can be seen from the above figure, it is mainly divided into two camps, one is Collection, t ...

Inner class Local inner class /* About the local inner class, its writing position, the class defined in the member method of the outer class Local internal classes can access member variables of external classes, including private variables! In the local location of the external class, access the member methods of the internal class and crea ...

To understand the underlying implementation principle of HashMap, we must first analyze some underlying source code of HashMap public class HashMap<K,V> extends AbstractMap<K,V> implements Map<K,V>, Cloneable, Serializable We can see that HashMap inherits AbstractMap and implements Map, Cloneable and Serializable interfa ...

Set Set set overview and features Set set features A collection that does not contain duplicate elementsThere is no indexed method, so you can't use a normal for loop to traverse Set set exercise Store string and traverse import java.util.HashSet; import java.util.Set; /* Set Set characteristics A collection that does not contain dupli ...

1: Title Sina Weibo can embed "topic" in the speech, that is, the topic text in the speech can be written between a pair of "#" to generate a topic link. Click the link to see how many people are discussing the same or similar topics with themselves. Sina Weibo will also update the list of hot topics at any time, and put t ...