Programmer Think

ArryList underlying data structure and common method source code understanding 1. First look at a test code package com.heyuanhang.conllention_; import java.util.ArrayList; /** * @Author He Yuanhang * @Date: 2021/4/17 12:57 * @Version 1.8 */ public class ArrayListYuanMa { public static void main(String[] args){ //The paramet ...

cs61b experimental record (VI) HW4 A* search algorithm Specifically, given an object of type WorldState, our solver will take that WorldState and find a sequence of valid transitions between world states such that the puzzle is solved. all puzzles will be implementations of the WorldState interface, given below public interface WorldState { ...

ArrayList source code analysis The source code viewed in this article is based on jdk1 eight RandomAccess ArrayList implements the RandomAccess interface, while the LinkedList class does not. This is a flag interface. As long as List implements this interface, it can support fast random access. For example, the binarySearch method in the Col ...

hashCode() and HashSet, compareTo() and TreeSet We often use Set in Java, but the author encountered a problem a few days ago. How to save the class he wrote into Set?? In the process of making force deduction, the generic parameters after Set are all wrapped classes, but some of the classes written by myself are not perfect enough, so the fu ...

Title Description: Please use only two queues to implement a last in first out (LIFO) stack, and support all four operations of ordinary queues (push, top, pop and empty). Implement MyStack class: void push(int x) pushes element X to the top of the stack. int pop() removes and returns the top of stack element. int top() returns the top elemen ...

JDK source code learning 06 currenthashmap analysis The principle of CurrentHashMap is very complex. You can only record what you understand. As we all know, the thread safety implementation principle of CurrentHashMap is Synchronized+CAS. Now let's take a look. Brief reading of notes * Overview: * The main design goal of this hash table is ...

Definition of sorting The process of arranging a given number of data elements into an ordered sequence according to the specified data items is called sorting. Inner sorting The process of reading the data to be sorted into memory at one time and completing the sorting is called internal sorting. External sorting The process of reading the dat ...

The final statistical scores of data structure courses offered in university classrooms are generally composed of "offline homework, offline experimental report, machine test and final theoretical examination". The theoretical knowledge of data structure and corresponding experimental reports have been shared with you before. For deta ...

1 what is LRU cache LRU (Least Recently Used) algorithm is an elimination strategy. In short, the implementation is as follows: put some elements into a container with fixed capacity for access. Due to the limited capacity of the container, the container should ensure that the elements that have been used recently are always in the contain ...

1, Implementation of linear table based on sequential storage structure 1. Definition of sequential storage The sequential storage structure of linear table is to store the data elements in the linear table in sequence with a section of storage units with continuous addresses. 2. Operation of sequential storage structure Use one-dimension ...