effective java 3rd

not conform to our normal thinking. For example, the following: Public class sample3_14{ publicstaticvoid main (string[] args) { int i = n; long L = >>; System.out.println ("i =" + i); System.out.println ("L =" + l);} } According to our normal understanding of the shift operation, the 32-bit integer value 88 is shifted left 32 bits, the entire bit pattern is displayed as 0, so the final result is 0, but in the final result I will find that the valu

method.Back to top recommended 46:equals should consider a null value scenarioContinuing with the 45 suggested questions, we solved the question of the reflexive nature of the overwrite equals, is it perfect? To refactor the main method:public static void main (string[] Args) {person p1= new person ("zhang san"); Person p2= the new person (null);/* no changes in other parts, no more repeating */}Very small changes, you must know that the result is the package "null pointer" Except

method.Back to top recommended 46:equals should consider a null value scenarioContinuing with the 45 suggested questions, we solved the question of the reflexive nature of the overwrite equals, is it perfect? To refactor the Main method:public static void Main (string[] args) {person p1= new person ("Zhang San"); Person p2= the new person (NULL);/* No changes in other parts, no more repeating */}Very small changes, you must know that the result is the package "null pointer" except

At the bottom, the data in Java is manipulated by operators.3.1 Simpler Print StatementsPut the SYSTEM.OUT.PRINTLN (x) in a class, and then use the static import method, so that the printing does not have to write so long.Import static net.mingview.util.print.*; All methods in the Print class are imported statically.3.2 Using Java Operators3.3 Priority level3.4 Assigning valuesUnderlying type: is a change i

have different ideas with other people, through the pair programming so that I can use different angles to think about how a program to write, and other people programming although a bit awkward but some benefits. 3. Code Cloud and PTA3.1. Code cloud codes Submission record3.2 PTA Problem Set completion diagram needs to have two graphs (1. Ranking chart. 2.PTA submission list diagram)3.3 count The amount of code completed this week Week Time Total code Amount New C

questions. Before you start programming, you can discuss the content first. Write the experience report, including the following: 1. Name of the other party. 2. The completed topic. 3. Impressions. 4. Photos (last time many students did not post photos, please affix)Party Name: Ma YulanTitle: PTA 7-1 jmu-java-03 Object-oriented foundation -01-constructors and ToStringFeelings: In the experiment class, the teacher gave the idea of thinking, and then e

--> --> Learning notes Java Graphic Design Volume I awt--3rd Chapter graphics Before the monitor broke down, file://wrote preface: I think it is not to learn notes, like a tutorial. I wanted to get something, so I had a little detail.Note 1: User interface artifacts (such as buttons, lists, menus, dialog boxes, and so on) provided in AWT do not contain similar purely object drawing objects (such as line

Package Temperature.convert;import Java.util.scanner;public class Converter {public static void main (string[] args) {//T ODO Auto-generated method stub int flag;//function Select int centigrade;//for input Celsius temperature int fahrenheit;//for input Fahrenheit temperature double centigrade1;// Used to save the calculated Celsius temperature double fahrenheit1;//is used to save the calculated temperature System.out.println ("Celsius temperature and Fahrenheit temperature conversion: 1-----Cel

Boolean Ismondaytofriday (). Sentiment is in the joint thinking when we have a healthy competition, all have to think about and share the idea of the same, not only completed the exercise also promoted the friendship.3. Code cloud and PTA3.1. Codes Cloud Code submission record In the Code cloud Project, select statistics-commits history-set time period, and then search for and The first two commits when the hand is written in the second week ... 3.2 PTA Problem se

，保证了数据的安全性。2. Add an parameterless constructor for the employee class, call its parameter constructor, set name to employee 1, salary to Hireday, and the date of the month is March 5, 2017. (Paste code)For:Public Employee () {This ("Employee 1", 3000.0, 2017, 3, 5);}3. Add an additional parameter constructor for the employee class, with only name and Salary,hideday as the current date. (Paste code)For:Public Employee (String N, double s) {Name=n;Salary=s;GregorianCalendar Calendar = new Gregoria

With the previous two blogs we have learned about the use of SPRINGMVC framework quick Build and @requestmapping annotations, let's introduce the Modelandview in the SPRINGMVC framework today. I personally understand that for the QuickStart Springmvc can be learned in the following ways Rapid construction of SPRINGMVC frame environment The use of @RequestMapping The use of Modelandview Integrated Spring+springmvc+mybatis Then learn the SPRINGMVC Framework Advanced Section [Us

3.1 Branch Structure 3.1.1 If statement structure if () { }else{ }3.1.2 Conditional operators condition? expr1:expr23.1.3 SWITCH statement structure switch () { Case Value1:nbs P nbsp, .... [break;] case value2: nbsp, ... NBS P [break;] case value3: nbsp, .... N Bsp [break;] NBSP;}NBSP;3.2 loop structure 3.2.1 While loop structure while (Boolean) { / /Loop body }3.2.2 Do-while loop structure do{ //cycle Body nbsp }while (...); 3.2

recommended to add component properties , data-options mode is HTML5) 2.js mode creation, the addition of attributes is a JSON format style -Scripttype= "Text/javascript"src=".. /easyui/jquery.min.js ">Script>Scripttype= "Text/javascript"src=".. /easyui/jquery.easyui.min.js ">Script>Linkrel= "stylesheet"type= "Text/css"href=".. /easyui/themes/default/easyui.css ">Linkrel= "stylesheet"type= "Text/css"href=".. /easyui/themes/icon.css ">Scripttype= "Text/javascript"src=".. /easyui/locale/easyui-la

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 (4th edition) [Thinking in

: Click to open Link(need resources 0 points of contact me ~) "Effective Java Chinese version (2nd edition)" Main content: in Java programming 78 very practical rules of experience, these rules of experience cover the problems faced by most developers every day solutions. A comprehensive description of the technologies used by the

way to impose constraints on multiple parameters is to check all the parameters that a constraint must hold with multiple setter methods. Once an invalid argument is passed, the constraint fails immediately, rather than waiting for the build method to be called. The slight advantage of builder compared to constructors is that builder can have multiple mutable parameters. Constructors, like methods, can have only one mutable parameter.The traditional abstract factory implementation in

ObjectiveSince March last year I began to read "effective Java second Edition", of course, I read the Chinese version of the; Maybe I can not understand the ability, for the content of the book always feel difficult to understand; take the first chapter of the content " Create and destroy objects "to say, this is the most I read the chapter, presumably the reason everyone also understand, every time I can n

Tips"Effective Java, third Edition" an English version has been published, the second edition of this book presumably many people have read, known as one of the four major Java books, but the second edition of 2009 published, to now nearly 8 years, but with Java 6, 7, 8, and even 9 of the release, the

DescriptionHere is read the "Effective Java Chinese version of the second edition" of the Reading notes, here will record some personal feeling a little bit important content, convenient for later review, may be due to personal strength reasons caused by misunderstanding, if found welcome to point out. Some individuals do not understand that will be marked with a slash.The first chapter is the introduction,

Tips"Effective Java, third Edition" an English version has been published, the second edition of this book presumably many people have read, known as one of the four major Java books, but the second edition of 2009 published, to now nearly 8 years, but with Java 6, 7, 8, and even 9 of the release, the