Programmer Think

catalogue c + + core programming Memory partition model 1. Before program operation 2 after the program runs 3 new operator c + + core programming This stage mainly focuses on the detailed explanation of C + + object-oriented programming technology, and discusses the core and essence of C + +. Memory partition model When the C + + p ...

preface Java Design Patterns 1, Singleton mode Hungry Han style public class Singleton { private static Singleton instance = new Singleton(); private Singleton() { } public static Singleton getInstance() { return instance; } } This is the simplest and crudest way to implement a safe Singleton mode, whi ...

1, Foreword Usually, many people think that the design pattern principle is six, and I have written seven here. Don't think it's a mistake. Don't say anything superfluous. Just look down. 2, Single responsibility principle 2.1 concept For classes, that is, a class should be responsible for only one responsibility. If category A is respo ...

Title Description: Write a function StrToInt to realize the function of converting string into integer. atoi or other similar library functions cannot be used. First, the function discards useless opening space characters as needed until the first non space character is found. When the first non empty character we find is a positive ...

Foundation of class class Dog: # This class is created from white space, so there are no parentheses in the definition # The first letter of the class should be capitalized def __init__(self, name, age): # init has two underscores on both sides, which is a special method # This method is defined to contain three for ...

catalogue 1, Preliminary understanding of classes and objects 2, Member of class  1. field 2. Method 3.static keyword 3, Encapsulation 1. What is encapsulation 2.private implementation encapsulation 3.getter and setter methods 4, Construction method 5, Code block 6, Supplement 1.toString method:  2. Anonymous object 1, ...

Preface This article is the author's record of learning Serializable and arcelable to explore his own questions I. Problems Caused by the Author Why does Java implement Serializable objects to realize that they support serialization? Why is Serializable less efficient than Parcelable? 2. Interpretation of Source Code Serializable cor ...

🚩 Java collection: on LinkedList 📚 1. Use of LinkedList set ✒️ 1.1 simple use of LinkedList set import java.util.LinkedList; public class TestDemo { public static void main(String[] args) { LinkedList<Integer> list = new LinkedList<>(); list.add(11); list.add(22); list.add(33); ...

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1 basic concepts of process and thread 1.1 background of the process The original computer can only accept some specific instructions. Every time a user inputs an instruction, the computer makes an operation. When the user is thinking or typing, the computer is waiting. This is very inefficient. In many cases, the computer is in a waiting sta ...