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  0x01: byte stream Byte stream base class 1. InputStream InputStream: the base class of byte input stream. The abstract class is a superclass representing all classes of byte input stream. Common methods: // Reads the next byte of data from the input stream abstract int read() // A certain number of bytes are read from the input st ...

Experimental principle and content Critical area management based on mutual exclusion Using the editor gedit 2_1.c, create a new 2_1.c source file, create two threads to complete the ticket booking operation concurrently, and enter the following example code: #include <stdio.h> #include <pthread.h> #include <unistd.h> int ti ...

1. Three ways to obtain class objects hello h = new hello(); //1. Obtain class objects through instance objects Class class1 = h.getClass(); System.out.println(class1); System.out.println(class1.hashCode()); //2. Get class object by object name Class class2 = hello.class; System.out.println(class2); System.out.println(class2.hashCode ...

1. Overview of arrays and sets Collections and arrays are structures that store multiple data, referred to as Java containers for short. Note: the storage at this time mainly refers to the storage at the memory level, and does not involve persistent storage (. TXT,. JPG,. Avi, in the database). Characteristics of array storage ...

1. What is object-oriented? stay Java In order to obtain objects, you must first design classes. Class (design drawing): Description of common characteristics of objects; Object: A concrete instance of what really exists The basic format of a class: public class Class name{ 1.Member variables (representing attributes) 2.Member method (repre ...

Content index Class loader Class loading system Class loading Dynamic class loading Dynamic class overloading Custom class overload Class load / reload example Java allows you to dynamically load and reload classes at run time, but this function is not as simple and direct as people want. This article will explain how to load and overload cl ...

IO Flow Concepts IO: Input/Output (input)   /  output) Stream: is an abstract concept, which is the summary of data transmission, that is, the transmission of data between devices is called stream, which is essentially data transmission IO streams are used to process data transfers between devices and are commonly used for fi ...

Chapter 17 Java 8 new features primary coverage Lambda expressionStreamAPIOptional Learning objectives Be able to understand the advantages of functional programming over object-oriented programming Be able to master the standard format of Lambda expression Ability to use Lambda standard format Be able to master the ellipsis format and rul ...

When we do projects, we often need to integrate and filter the data, and judge after using the for loop every time. I believe you must be tired. Now the Lamda expression newly exited by Java 8 and Steam API can perfectly process the data and complete the function of shuttling between the data. Stream means stream, which is slightly differen ...

Introduction ​​ Have nothing to do: The excrement shoveling officer made a hamster toy for the cat owner with waste cardboard boxes. Look, the owner has a lot of fun I knocked it out - eh, why, why are there two? Isn't it exciting? This is a good chance to improve your relationship with the master! ​​ Ha ha ha! After reading the above ...