learning java 4th edition

20172319 2018.03.27-04.05 "Java Program Design" 4th Week study summary textbook Learning content Summary fourth Chapter writing class Review of classes and objects: The object is stateful, and the state is determined by the property value of the object. Properties are defined by the variables declared in the class. The operation of the object may change

Learning Summary1, String str= "Hello world!"; (Java), char[20]= "Hello world!"; (C). In fact, the implementation of Java string, is also a character array.2. The trailing end of the string ends with a null character, so "Hello world! "The length of this character array is 13. The 3. The difference between scanf ("%s", name) and gets:1#include 2 intMainvoid){3

20145129 "Java Program Design" The 4th Week study summary textbook Learning content Summary Inheritance and polypeptide The inheritance common behavior inheritance is to avoid duplicate definitions of common behavior among multiple classes. (Promote the same code to the parent class) The keyword extends: Indicat

() {return name;} public void SetName (String name) {this.name = name;}}App1.javaPackage Com.litao.ioc;import Org.springframework.beans.factory.beanfactory;import Org.springframework.beans.factory.xml.xmlbeanfactory;import Org.springframework.context.ApplicationContext; Import Org.springframework.context.support.classpathxmlapplicationcontext;import Org.springframework.core.io.classpathresource;public class App1 {/** * @param args */public static void main (string[] Arg s) {//TODO auto-generate

20172333 2017-2018-2 "Java Program Design" 4th Week study summary textbook learning content1. Definition and concept of class structure2. Using instance data to establish the concept of object state3. Describe the effect of the visibility modifier on methods and data4. The use of learning method parameters and return v

because the constructor permission is set to private and only in the class can be instantiated.Problems in teaching materials learning and the solving processOther (sentiment, thinking, etc., optional)At the beginning of this week's mission, one saw what "magician", "Swordsman" ... Feel good surprised, learn Java so short time, I will be programming game! With this surprise I began to study this week, howe

interface 1、接口定义行为： 对于“定义行为”，可以使用interace关键字定义。 类要操作接口，必须使用implements关键字。 操作某接口时，对接口中定义的方法有两种处理方式，一是操作接口中定义的方法，二是再度将该方法表示为 abstract。 2、行为的多态： 只要是操作同一个接口的对象，都可以使用同一方法（行为）。 3、解决需求变化： 在java中，类可以操作两个以上的类，也就是拥有两种以上的行为。 在java中，接口可以继承自另一个接口，也就是继承父接口行为，再在子接口中额外定义行为。7.2 Interface Syntax Details 1、接口的默认： 接口中的方法没有操作时，一定得是公开并且抽象。 2、匿名内部类： 临时继承某个类或操作某个接口并建立实例，由于只使用一次，不需要为这些类定义名称，这时可以用匿名内部 类（Anonymous Inner Class）。 3、使用

;}public class Main { public static void main (String[] args){ System.out.println(Some.x); }}is declared as a member of the protected, classes in the same package can be accessed directly, and classes in different packages need to be accessed in the inherited subclass. The code does not have a different class of inheritance relationships, compile failed, delete protected compile pass result is 10Others (sentiment, thinking, etc.)Do not have any sentiment, tomorrow internship, find the opportunit

not flexible, good maintenance problems; There are some less expressions in the book, Places that are not very well understood, such as the instanceof operator, override, and so on, can only be learned through video. At this stage still stay in the process of knocking on the book Code, I hope that I can put forward some more valuable questions.Problems in code debugging and the resolution processis declared as a member of the protected, classes in the same package can be accessed directly, and

Learning content:1, mainly for the first 3 days of the Java Foundation exercises, in additionRepresentation of numbers in Java1. decimal int x = 100;2. Eight binary int y = 077;3.16 binary int z = 0XEF;No binary representation2, bit operation is directly to the binary operation>> right Shift: removed low drop discarded, the highest bit according to the original symbol to fill, the remaining 0, equivalent to

Buy Classic Java IDE myeclipse send Java Classic best-selling book: Basic version of the book Yas Block masterpiece "Effective Java Chinese version (2nd edition)", buy advanced version of the programmer must book "Java Programming Ideas (

"Java2 Practical Tutorial (Fifth Edition)", chapter 1th, Introduction to Java Main content: P1 Status of 1.1Java: P1 Features of 1.2Java: P2 1.3 Installing JDK:P5 1.4Java program Development Steps: P8 1.5 Simple Java Applications: P9 1.6Java anti-compilation: P13 2nd. Basic data types and arrays Main content: P17

compared to the length of the previous oldest stringMaxLength = (MaxLength > (Strlength-start))? MaxLength: (strlength-start); returnmaxLength; }Test Case One: Public Static voidMain (string[] args) {//input:s String s= "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789!\" #$% ' () *+,-./:;; intLength =lengthoflongestsubstring (s); //output:95System.out.println (length); }Test Case Two: Public Static void Main (string[] args) { //input:s String s= "Wlrbbmqbhc

How I self-study Android, data sharing (2015 version)Tikitoo2015.02.11 10:211713 words 3,932 ReadsI learned two or three months of Android, recently spent a week or so of time to write a app--diigoer (open source), and spent a two weeks to find a job, received two offer, also is a recognition of their own learning it; I just started to learn the summary of the I am how to self-study Android, data sharing, if it is a beginner Android, should not be mis

1. Naming rules:Here to draw on the other people's information, more comprehensive, easy to understand learning. The Java source file name of the Java source must be the same as the class name of the class defined in the source file. The first part of the package's named package name should be a lowercase ASCII character and be one of the top-level d

application of module boundaries at build time SummarizeThis is the "effective Java third Edition" new entries, this article is just about the display of new additions, the specific content or need readers to read books to understand, I am currently in the reading, follow-up what reading sentiment will be timely and gentlemen share. So, the important question is, how to get the book, because the Chine

thrashing.innodb_thread_concurrency=8At the same time, we can see the installed programs in the Start menu program as well:Click on it to start running:Open Computer Management to see that the MySQL service is started:You can also see in the process:V. MySQL Uninstall:1, to the control panel inside the first to remove the MySQL software;2, delete the MySQL installation directory (if the other disk also has a set directory to be deleted, empty directory also to delete);3. Delete the following fi

In the beginning of the advent of JavaScript, no one will think it will be applied so widely, but also far more complex than most people imagine, in the process of my own learning, there have been many shocks, but often not long, a lot of beautiful use is blurred again, I hope that through the JavaScript Advanced Programming (3rd Edition) of the topic of learning

IDgetElementsByTagName (tagname) return a collection of objects in an array--document that all elements are tagnameGetelementsbyclassname (classname) return a collection of all objects in the array--document that are named ClassName (this method is new in the HTML5 DOM)* Here's a small thing to do, because HTML5 DOM provides getelementsbyclassname, so there may be browsers that don't. But I don't think so, so I can hand-getelementsbyclassname aThere are tutorials and code in the book, and I'll

48916.3.4 process contains how many steps 49016.3.5 need to control and monitor 4911 6.3.6 when to redefine a project objective 49216.4 law Field 49216.4.1 Royce Methodology 49316.4.2 Extreme Programming (XP) 49616.4.3 Rugby methodology 50016.5 Case study 50516.5.1 XP project: ATRAC T 50616.5.2 Local main customer: FRIEND 50816.5.3 Distributed project: JAMES 51316.5.4 Case Study summary 51816.6 recommended readings 52116.7 Exercise 521 Part 4 Appendix Appendix A design Pattern 525a.1 Abstrac T