java self study

The Java Way of self-study (i)------a little advice for beginnersThere are a lot of books about Java on Kakiba, but it's like being in a melon field and picking a melon, and a lot of people don't know if they should choose that book. Soon proficient in Java may only a few people can achieve, that is, he has refined thr

Zhang Jiyue 201771010139" Object-oriented programming (java)" first week study summaryPart I: Course preparation sectionFill out the course study Platform Registration account, Platform Name Registered Account Blog Park: www.cnblogs.com Tonma Program Design Evaluation: https://pintia.cn/ [Email protected]

[Java in-depth research] 8. Java's Unsafe class details, in-depth study of unsafe Java cannot directly access the underlying operating system, but is accessed through local methods. The Unsafe class provides hardware-level atomic operations and mainly provides the following features:1. memory can be allocated through the Unsafe class and can be released; Class Th

to call inside a constructor is those that is final in the base class. (This also applies to private methods, which is automatically final.)Convariant return typesJava SE5 adds convariant return types, which means, a overridden method in a derived class can return a type derived From the type returned by the Base-class methodDesigning with InheritanceIf you choose inheritance First when you ' re using a existing class to make a new class, things can become needlessly comp Licated.A better appro

Simple Java version of the Education System ----- self-study results, java ----- I wrote a blog for the first time and shared a piece of software I had made a long time ago. The reason for this is that I have participated in a teaching team and found many problems. I feel that using software can reduce a lot of unnecessary troubles, so I have nothing to learn a

java Tenth Week learning experience Through the tenth week of learning, we learned about generic programming (Generic programming), which is also known as a parameterized type, that is, when defining classes, interfaces, and methods, the type parameter indicates the type of object that will be processed (such as the ArrayList Class). Generic programming means that writing code can be reused by many different types of objects, generics are abstract s

[Java self-study] Double prime number, java Prime Number 1 package codeTask_FangFa; 2 // 5.30 double prime number is two prime numbers with a difference of 2. The program displays all the double prime numbers smaller than 1000. Display by format. 3 public class ShuangSuShu {4 public static void main (String [] args) {// the so-called main method; 5 int number

1 /*2 3 the value of the base data type is passed without changing the original value, because the stack is played after the call and the local variable disappears4 the value of the reference data type is passed, changing the original value, because even if the method is on the stack, but the heap memory array object is still in, you can continue to access through the address5 6 the value that the base data type passes to the parameter7 the address to which the reference data type is passed to t

201772020113 "Object-oriented Programming (Java)" First week study summaryPart I: Course preparation sectionFill in the Course Learning Platform Registration account,Platform NameRegistered AccountBlog Park: www.cnblogs.comBmwbProgram Design Evaluation: https://pintia.cn/BmwbCode Hosting Platform: https://github.com/No landing.Chinese University mooc:https://www.icourse163.org/White Diffuse GuardThe followi

There is always a lot of things to be used for project development. It is not a short time for a new knowledge to come out, but a new one for yourself. Therefore, you need to learn it by yourself, it is hoped that the learning efficiency will be improved in the future. This article is about Java serialization and is optional. [Knowledge point] 1. What is serialization? We all know that objects are temporarily stored in the memory and cannot be taken a

Wang Yan 201771010127" Object-oriented programming (java)" First week study summaryPart I: Course preparation sectionFill out the course study Platform Registration account, Platform Name Registered Account Blog Park: www.cnblogs.com JAVA-729 Program Design Evaluati

I saw the email development video explained by Zhang Xiaoxiang, but I only watched a small part of it. At that time, I was a little newbie and didn't understand it. I thought it was a very complicated technology. The mail sending function is used in a small project that has recently been practiced. This function is implemented by referring to the Code on the Internet. Now, it's so easy! Before enabling this function, you need to download the jar package mail. Jar required for sending emails. Yo

After learning the flash event mechanism, we began to learn three communication methods in flex and Java. FLEX can communicate with Java in three ways: ● Flex accesses Java common classes using the remoteobject method, which is also the most commonly used method. ● Flex uses httpservice to access Java Server classes

Wang Yan 201771010127" Object-oriented programming (java)" second Week study summaryPart I: Theoretical Knowledge learning Section3.1: Basic concepts. 1) Identifier: The identifier consists of a letter, a number, a dollar sign, and an underscore. And the first symbol cannot be a number. For example: Hello,$1234, program name,www_123 , etc. are all legal identifiers . Identifiers can be used as: class nam

First, let's talk about the differences among final, finally, and finalize. Second, can Anonymous Inner Class (Anonymous internal Class) be extends (inherited) other classes, or implements (implemented) interface (interface )? Third, the difference between Static Nested Class and Inner Class is that the more you say, the better (the more general the interview questions are ). Fourth, the difference between and. Fifth, the difference between HashMap and Hashtable. Sixth, the difference between C

Today, the third method of communication between flex and Java is finally completed. I didn't figure it out because I don't know how to create a WebService. The free weather forecast service is used on the Internet. All right, you just want to learn this communication style for weather forecast, but I am not sure. Fortunately, we finally got it out today. We know that flex and Java have three communication

[Previous words] recently, my face has been dry and I need to buy some cosmetics. Java generics have a good learning experience. [Definition] 1. There are two main types of generic definitions: Some types containing type parameters in program encoding, that is, generic parameters can only represent classes, it cannot represent individual objects. (This is a common definition today) Some Classes Containing Parameters in program encoding. Its parameters

201771010107 Feng Zhixia "Object-oriented programming (java)" First week study summaryPart I: Course preparation sectionFill in the Course Learning Platform Registration account, Platform Name Registered Account Blog Park: www.cnblogs.com www.cnblogs.com/fzx201626 Program Design Evaluation: https://pintia.cn/ [Email protected] Code Hosti

New Object ();Main reference: "In-depth understanding of Java Virtual Machine", without the consent of the author and the original book to prohibit reprint.Data regions in the JVMThe data in the JVM is divided into the following areas:which1. Program Counter:A program counter is a small amount of memory space that is the line number indicator of the bytecode that is executed by the current thread . In other words, after the program is translated into

value reference: Data before testing: The value of a is 10. The value of B is 10. Tested data: The value of a is 20. The value of B is 10. Here is the transfer address reference: Data before testing: Diff. x = 10 diff1.x = 10 Tested data: Diff. x = 100 diff1.x = 100 */ Yes, it is similar to some program examples in C/C ++. In fact, there are two ways to pass parameters in C ++: call by alues by passing values) and call by reference. In