effective java 4th edition

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Effective Java English Second Edition reading notes Item 13:minimize the accessibility of classes and members

Label:The visible field of the access modifier Private-the member is accessible only from the top-level class where it is declared.Package-private-the member is accessible from any class in the packagewhere it is declared. Technically known as default access, this is the access levelYou get if no access modifier is specified.Protected-the member is accessible from subclasses of the class where it isDeclared (subject to a few restrictions [JLS, 6.6.2]) and from any class in thePackage where it is

Effective Java Third edition--1. Consider using static factory methods instead of construction methods

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 n

Effective Java Second Edition Enum

/*** Effective Java Second Edition* 30th: Use enum instead of int constant*/Import Java.util.HashMap;Import Java.util.Map;public class Enumtest {/* Media operation */Public final static int START = 1;Public final static int PAUSE = 2;Public final static int RESUME = 3;Public final static int STOP = 4;/* Return results */Public final static int ret_ok = 1;private

"Effective Java Chinese version 2nd edition" study note 6th: Eliminate outdated object references

up when a new entry is added to the cache. The Linkedhashmap class can implement the latter through its Removeeldestentry method. For more complex caches, you must use Java.lang.ref directly.A third common source of memory leaks is listeners and other callbacks.If the client registers callbacks in its own implementation of the API, but does not explicitly unregister, they will accumulate unless some action is taken. The best way to ensure that callbacks are immediately treated as garbage collec

Effective Java Third edition--20. Interface is better than abstract class

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 n

Effective Java Third edition--45. Use stream wisely and prudently

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 n

Effective Java English Second Edition reading note Item 2:consider a builder when faced with many constructor parameters.

; } PublicBuilder Calories (intcalories) { This. Calories =calories; return This; } PublicBuilder Fat (intfat) { This. Fat =fat; return This; } PublicBuilder Sodium (intsodium) { This. sodium =sodium; return This; } PublicBuilder Carbohydrate (intcarbohydrate) { This. Carbohydrate =carbohydrate; return This; } PublicNutritionfactsbuilder Build () {return NewNutritionfactsbuilder ( This); } } Private

Spring Combat (4th edition)

The introduction of Spring Combat (4th edition) is a classic, best-selling Spring learning and Practice Guide. The 4th edition is fully updated for spring 4. The book consists of four parts. The 1th part introduces the core knowledge of the spring framework. The second part of this article explains how to build a Web a

Spring Combat (4th edition) PDF

: Network Disk DownloadSpring Combat (4th edition) is a very popular spring book and is one of the most familiar spring classics for domestic readers, from getting started to mastering Java Web Development to know the inside of Java Spring technology.More than 100 000 developers worldwide use this book to learn the spr

Automatic generation of JavaBean based on table structure, the strongest and most professional javabean tool in the history of Table structure (4th edition)

 Directory:1th Edition: http://blog.csdn.net/vipbooks/article/details/519121432nd edition: http://blog.csdn.net/vipbooks/article/details/519125373rd Edition: http://blog.csdn.net/vipbooks/article/details/519127504th Edition: http://blog.csdn.net/vipbooks/article/details/51912930Released the

"Beginning hibernate-for Hibernate 5, 4th Edition" (01_ Guide Introduction)

650) this.width=650; "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/ Images/localimage.png ") no-repeat center;border:1px solid #ddd;" alt= "Spacer.gif"/>650 "this.width=650;" src= " Https://s4.51cto.com/wyfs02/M02/8F/B9/wKioL1jrOraykpoxAADivBwgZno871.png "title=" Cover.png "alt=" Wkiol1jroraykpoxaadivbwgzno871.png "/>"Beginning hibernate-for Hibernate 5, 4th Edition

Turing Programming Series Algorithm (4th edition) PDF

the word lookup tree 4875.2.5 which implementation of the string symbol table should be used 4895.3 Substring Lookup 4935.3.1 History Introduction 4935.3.2 Brute force substring search algorithm 4945.3.3 Knuth-morris-pratt substring Lookup algorithm 4965.3.4 Boyer-moore String Lookup algorithm 5025.3.5 rabin-karp fingerprint string lookup algorithm 5055.3.6 Summary 5095.4 Regular Expressions 5145.4.1 using regular expressions to describe patterns 5145.4.2 thumbnail notation 516Practical applica

Algorithm (4th Edition) -1.2.1 using abstract data types

non-static (instance) methods in use case code: the beginning of a static method call is the class name (which is used in uppercase), and not the beginning of a static method call is always the object name (in the custom lowercase).7. Java passes a copy of the parameter value from the caller to the method, which is known as Pass-by-value. One important consequence of this approach is that the method cannot change the value of the Call-side variable.

Algorithm (4th edition) -1.4.8 processing dependency on input

Summary: Title.Focus:1. An effective way to handle dependencies on input:· More careful modeling of inputs processed by the problem we are addressing· Guaranteed performance for worst-case scenariosThe worst case scenario in a computer system is a very real concern, because the input of the program may come from another (possibly malicious) user rather than the nature. For example, a Web site that does not provide a performance assurance algorithm is

Algorithm (4th Edition) -1.4.3 mathematical model

sometimes the input model) determines the order of magnitude of growth.Separating the algorithm from the specific implementation on a computer is a powerful concept because it is our knowledge of algorithmic performance that can be applied to any computer.8. We used a cost model to evaluate the nature of the Algorithm.This model defines the basic operations in the algorithm we are studying.For example, the cost model for 3-sum problems is the number of times we access array Elements.The role of

Algorithm (4th edition) -1.3.2 implementation of collection class data types

sufficient to save all the elements, without wasting too much space:If there is no extra space, we will double the length of the array;If the stack size is less than One-fourth of the array, we will halve the length of the array.In this implementation, the stack never overflows, and the usage is never less than One-fourth (unless the stack is empty, in which case the array size is 1).The textbook has the source code, fully understand!5. Even if the use case no longer requires this element, the

Algorithm (4th edition) -1.1.6 static method

variable itself). Public classTestarray { Public Static voidMain (string[] args) {Double[] A; A=New Double[5]; Sort (a); for(inti = 0; i ) {System.out.println (a[i]); } } Public Static voidSortDoubled[]) { for(inti = 0; i ) {D[i]= 5.0; } }}In the above example, the contents of the original array A are changed because sort () passes in the alias D of array A and changes the contents of D.4. Reasons for using recursion:· The recursive code is more concise, elegant, and u

Algorithm (4th edition)-1.1 exercises (partial)

1.1.3Command-line method of taking arguments:1.stdin.readint (): Java XX, run, input parameters, separated by spaces or line breaks;2.integer.parseint (Args[0]): Java XX parameter, separated by a space, run.1.1.6 for (int i = 0; I ) { stdout.println (f); = f + g; = f- g;}Note that when running to G = f-g, this line, F has changed.1.1.8System.out.println (' B ' + ' C ');Answer: 197"" Represents a

Algorithm (4th edition) -1.2.5 design of data types

does not initiate assertions, and you can use the-enableassertions flag (abbreviated as-EA) at the command line to start the assertion. The purpose of the assertion is to debug: The program should not rely on assertions in normal operations, as they may be disabled. The system programming course learns to use assertions to ensure that the code is never terminated by a system error or into a dead loop. (? )10. If you always complain about the nature of programming language, then you can only des

Algorithm (4th edition) -1.1.5 array

exception.4. Familiarize yourself with the typical array processing code (P11-P12):· Find the largest element in an array· Computes the average of an array element· Copying an array· Reverse the order of array elements· Matrix multiplication (Phalanx)-a[][] * b[][] = c[][]5. The array name represents the entire array-if we assign an array variable to another variable, then two variables will point to the same array. If you want to copy an array, you should declare, create, and initialize a new

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