Sponsors sentry.io – Your code is broken. For classes with object reference fields that must remain private, defensively copy each object in such a field. Update: Here is the newest version of this article. Everyday low prices and free delivery on eligible orders. The comprehensive descriptions and explanations for each item illuminate what to do, what not to do, and why. Ich kenne das Buch seit der ersten Ausgabe, es gehört meiner Ansicht nach zur Pflichtlektüre jedes Java-Entwicklers. Effective Java Item 1. Effective Java™, Second Edition, brings together seventy-eight indispensable programmer’s rules of thumb: working, best-practice solutions for the programming challenges you encounter every day. One must know the basic / medium level concepts of Java before reading. Update: Here is the newest version of this article. Finden Sie alle Bücher, Informationen zum Autor, Stöbern Sie jetzt durch unsere Auswahl beliebter Bücher aus verschiedenen Genres wie Krimi, Thriller, historische Romane oder Liebesromane, Head First Design Patterns (A Brain Friendly Guide), Domain-Driven Design: Tackling Complexity in the Heart of Software, Walls, C: Spring in Action, Fifth Edition, Patterns of Enterprise Application Architecture, Java by Comparison: Become a Java Craftsman in 70 Examples, Clean Code: A Handbook of Agile Software Craftsmanship (Robert C. Martin), Effective Java: Best Practices für die Java-Plattform, Clean Architecture: A Craftsman's Guide to Software Structure and Design: A Craftsman's Guide to Software Structure and Design (Robert C. Martin Series), Microservices Patterns: With examples in Java, Refactoring: Improving the Design of Existing Code (Pearson Addison-Wesley Signature Series). Effective Java Item Preview remove-circle Share or Embed This Item. This book is an essential piece of reading for any junior level engineer, Rezension aus dem Vereinigten Königreich vom 9. ALM Merise UML Java. Java Concurrency in Practice by Brian Goetz Paperback $45.64. 3.0m members in the programming community. Introduction. Providing a static factory method instead of a public constructor has both advantages and disadvantages. Active 8 years, 4 months ago. This pattern is common in Android development. Effective Java: Item 01 Static Factory Method. Effective Java Item 7: Avoid finalizer. Leider ist ein Problem beim Speichern Ihrer Cookie-Einstellungen aufgetreten. Written for the working Java developer, Joshua Bloch's Effective Java Programming Language Guide provides a truly useful set of over 50 best practices and tips for writing better Java code. 075: Effective Java - Item #15 Mar 6 '17 play In this mini-Fragment episode, Donn talks about Item #15 of the Effective Java series - Minimize Mutability. I reference it often and probably this is why I am often asked to say or write more about it. USt. Must own this book and read carefully, read each page 10 times if you have to, it’s priceless. Computer Programming. Effective Java 3rd ITEM 12; 2019-04-30. Effective Java book by Joshua Bloch is one of the most important books about Java development. Viewed 2k times 1. Many patterns, idioms, and antipatterns are described, … Wir verwenden Cookies und ähnliche Tools, um Ihr Einkaufserlebnis zu verbessern, um unsere Dienste anzubieten, um zu verstehen, wie die Kunden unsere Dienste nutzen, damit wir Verbesserungen vornehmen können, und um Werbung anzuzeigen. Start your free trial. This is why some items of Effective Java are obsolete and we don’t need to worry about them anymore. This highly anticipated new edition of the classic, Jolt Award-winning work has been thoroughly updated to cover Java SE 5 and Java SE 6 features introduced since the first edition. The Definitive Guide to Java Platform Best Practices–Updated for Java 7, 8, and 9. Lately I’ve been learning Effective Java by Joshua Block. This highly anticipated new edition of the classic, Jolt Award-winning work has been thoroughly updated to cover Java SE 5 and Java SE 6 features introduced since the first edition. I reference it often and probably this is why I am often asked to say or write more about it. In stock. Effective Java Item #77 - Serialization of singleton objects - Why should I have to use readResolve? Chapter 2 Creating and Destroying Objects Item 1 Consider static factory methods instead of constructors: A class can provide its clients with static factory methods instead of, or in addition to, public constructors. It's a very good reference to have around and the updates of best practice with the newer language features are really useful. Java's increased support for multiple paradigms increases the need for best-practices advice, and this book delivers. 4 Personen fanden diese Informationen hilfreich, Rezension aus Deutschland vom 5. There is a lot of content in this book which can make it difficult to get through but thankfully its written in a manner where you can pick up any chapter without context of the prior chapters. September 2018. cloning - Effective Java Item 11: Override clone Judiciously - for class array field josh says if clone method simply homecoming super.clone(), resulting class instance have right values in primitive fields, array field refer same array original class instance. Effective Java by Bloch, Joshua. Reflection provides programmatic access to the class’s member names, field types, method signatures, etc. Make every field final unless there is a compelling reason to make it nonfinal, Unlike method invocation, inheritance violates encapsulation, Subclasses depend on their superclasses, which could be changed and as result broken functionality in subclasses. Primitives have only their values, whereas boxed primitives have identities distinct from their values. We use cookies and similar tools to enhance your shopping experience, to provide our services, understand how customers use our services so we can make improvements, and display ads. As in previous editions, each chapter of Effective Java, Third Edition, consists of several “items,” each presented in the form of a short, stand-alone essay that provides specific advice, insight into Java platform subtleties, and updated code examples. To avoid confusion use common names like, Throw an exception in a private constructor to avoid reflection call to constructor, If standard serialization is needed make all fields transient and override, Best way to use single element enum as a singleton, Include a single private constructor to a class to prevent it from instantiation, Throw an exception in constructor if it is called, Almost always used technique for utility classes, Immutable objects could be reused for free, Garbage collector is not savior from memory leaks, Deregister outdated listeners and callbacks, No guarantee finalizers will be executed promptly, No guarantee finalizers will be executed at all, Use own explicit methods for finalization like, There is no way to extend an instantiable class and add a value component while preserving the equals contract, Do not write an equals method that depends on unreliable resources. Etwa EnumMaps. Contents. August 2018. This is a book about Java usage, as the author clearly underscores in the preface. The book contains 78 independent items, discussing various aspects of programming in java. Rezension aus Deutschland vom 27. Dezember 2017), Rezension aus Deutschland vom 23. effective-java Overview Overview Details; Activity; Cycle Analytics; Repository Repository Files Commits Branches Tags Contributors Graph Compare Charts Issues 0 Issues 0 List Board Labels Milestones Merge Requests 0 Merge Requests 0 Wiki Wiki Snippets Snippets Members Members Collapse sidebar Close sidebar; Activity Graph Charts Create a new issue Commits Issue Boards; Open sidebar. We use cookies and similar tools to enhance your shopping experience, to provide our services, understand how customers use our services so we can make improvements, and display ads. The content is mesmerising, I feel like I’d be in trouble if I hadn’t off started this book. Ich habe es mir jetzt hauptsächlich wegen der Neuerungen bis Java 9 gekauft und um es den Junior-Entwicklern empfehlen zu können. Features. Never do anything time-critical in finalizers. The code examples are the real gold in this book, very concise and helpful. Accueil Forums Rubriques. There clearly are reasons why other programming languages still win popularity over Java. Function objects are simulate functions in OOP Das Buch an sich ist fantastisch. Geben Sie es weiter, tauschen Sie es ein, © 1998-2020, Amazon.com, Inc. oder Tochtergesellschaften, Clean Architecture: A Craftsman's Guide to Software Structure and Design: A Craftsman's Guide to…, Übersetzen Sie alle Bewertungen auf Deutsch, Lieferung verfolgen oder Bestellung anzeigen, Recycling (einschließlich Entsorgung von Elektro- & Elektronikaltgeräten), Functional interfaces, lambda expressions, method references, and streams, Type inference, including the diamond operator for generic types, New library features such as the Optional. Wählen Sie die Kategorie aus, in der Sie suchen möchten. An vielen Stellen ist der Text nicht richtig gedruckt und das Papier ist durchgeghend durchsichtig. The default implementation of the equals() method uses the "==" relation to compare two objects. Item 19 also references Java 9's heavy use of @implSpec . Sie hören eine Hörprobe des Audible Hörbuch-Downloads. Mai 2020, Auch nach 25 Jahre Java Geburtstag ist diese Buch relevant. Tagged class use internal state to indicate its type; Tagged classes are verbose, error-prone, and memory inefficient; Hierarchy classes provide more compile time checks; Item 21: Use function objects to represent strategies. If an entire object graph must be validated after it is deserialized, use the. Older programming languages, such as C, mandated that local variables must be declared at the head of a block, and some programmers continue to do this out of habit. In the book "Effective Java" from Joshua Bloch on page 119 (Item 25) he states: Java Java Web Spring Android Eclipse NetBeans .NET. Effective Java(tm), Second Edition,brings together seventy-eight indispensable programmer's rules of thumb: working, best-practice solutions for the programming challenges you encounter every day. Oktober 2020. Active 8 years, 6 months ago. A source of wisdom in times of confusion. Effective Java book by Joshua Bloch is one of the most important books about Java development. 3 Personen fanden diese Informationen hilfreich, Rezension aus Deutschland vom 27. This book was created with the intention of translating the effective java items found in the book written by Joshua Bloch to Kotlin. Avoid finalizer. by Joshua Bloch. Um die Gesamtbewertung der Sterne und die prozentuale Aufschlüsselung nach Sternen zu berechnen, verwenden wir keinen einfachen Durchschnitt. Kaufen! Caution: Discussed singleton without lazy initialization, // Use lower-level abstraction to do our bidding, random thoughts about programming, math and life |, Static factory methods have more informative names than constructors, Not required to create new objects, could return cached instance, Static factory methods could return object subtype, Reduced verbosity for generics due to type inference, Classes without public/private constructor can’t be subclassed, but it is good, because it enforces to “favor composition over inheritance”, Hard to distinguish from other static methods. Deutlich besser als erwartet. The JDC is pleased to present two chapters from Joshua Bloch's book Effective Java Programming Language Guide, from the The Java Series. This is the first article about Effective Java Items. And yes, the author is not always fond of the ideas behind the way Java implements things. Effective Java #77 states that we have to use readResolve to preserve the Singleton guarentee during serialization. The comprehensive descriptions and explanations for each item illuminate what to do, what not to do, and why. Much of the stuff taught in this book is very transferable to other realms of development. It is written in a style that is easy to follow and doesn't read like a technical specification. Lately I’ve been learning Effective Java by Joshua Block. Press question mark to learn the rest of the keyboard shortcuts Jun 3, 2018 • Ivan. (in Deutschland bis 31.12.2020 gesenkt). This highly readable book tells you how to use the Java programming language and its most fundamental libraries to best effect. Effective Java Item 1. Java. Chapter 2 Creating and Destroying Objects Item 1 Consider static factory methods instead of constructors: A class can provide its clients with static factory methods instead of, or in addition to, public constructors. Effective Java™ Programming Language Guide Joshua Bloch Effective Java,™ Second Edition Stephanie Bodoff, Dale Green, Kim Haase, Eric Jendrock The J2EE™ Tutorial, Second Edition Mary Campione, Kathy Walrath, Alison Huml The Java™ Tutorial, Third Edition: A Short Course on the Basics Mary Campione, Kathy Walrath, Alison Huml, The Tutorial Team The Java™ Tutorial Continued: The … Prime-Mitglieder genießen Zugang zu schnellem und kostenlosem Versand, tausenden Filmen und Serienepisoden mit Prime Video und vielen weiteren exklusiven Vorteilen. Effective Java item 19- only using interfaces to define types. As a rule, objects should not be accessed reflectively in normal applications at runtime, Create instances reflectively and access them normally via their interface or superclass, The Java Native Interface (JNI) allows Java applications to call native methods, which are special methods written in native programming languages such as C or C++, Access to platform-specific facilities such as registries and file locks, Access to libraries of legacy code, which could in turn provide access to legacy data, Used to write performance-critical parts of applications, Do not use native methods for improved performance, Applications using native methods have disadvantages, programs are not immune to memory corruption errors, Premature optimization is the root of all evil, Strive to write good programs rather than fast ones, Strive to avoid design decisions that limit performance, Consider the performance consequences of your API design decisions, Measure performance before and after each attempted optimization, Conventions should not be followed blinfly if long-held conventional usage dictates otherwise, Placing code inside a try-catch block inhibits certain optimizations that modern JVM implementations might otherwise perform, A well-designed API must not force its clients to use exceptions for ordinary control flow, Java provides three kinds of throwables: checked exceptions, runtime exceptions, and errors, Use checked exceptions for conditions from which the caller can reasonably be expected to recover, Unchecked exceptions indicate programming error and not needed to be handled, Errors indicated JVM problems and not needed to be handled at all, If catching exception provide no benefit (, One technique for turning a checked exception into an unchecked exception is to break the method that throws the exception into two methods, additional method returns a boolean that indicates whether the exception would be thrown, While exception translation is superior to mindless propagation of exceptions from lower layers, it should not be overused, Always document checked exceptions with javadoc, Do not document multiple excetions by their common superclass (, Do not include unchecked exceptions in method, If an exception is thrown by many methods in a class for the same reason, it is acceptable to document the exception in the class’s documentation comment, To capture the failure, the detail message of an exception should contain the values of all parameters and fields that “contributed to the exception”, Exception detail message for programmers, not for users, If an object is immutable, failure atomicity is free, Check parameters for validity before performing the operation, Perform partial computations and then check for validity, Write recovery code to return object to its original state after exception, Make temporary code, apply changes and then replace original object if no exceptions are thrown, Failure atomicity is not always desirable (implementation complexity, performance), If method is not failure atomic, reflect that in documentation, An empty catch block defeats the purpose of exceptions, At the very least, the catch block should contain a comment explaining why it is appropriate to ignore the exception, Synchronization prevent a thread from observing an object in an inconsistent state, Synchronization ensures that each thread entering a synchronized method or block sees the effects of all previous modifications that were guarded by the same lock, Reading or writing a variable is atomic unless the variable is of type, A recommended way to stop one thread from another is to have the first thread poll a, Synchronization has no effect unless both read and write operations are synchronized, Strive to assign mutable data to a single thread, To avoid liveness and safety failures, never give control to the client within a synchronized method or block, Do as little work as possible inside synchronized regions, When in doubt, do not synchronize your class, but document that it is not thread-safe, Executor framework separates unit of work (task) and mechanism (thread creation), Prefer higher-level concurrency utilities (Executor Framework, concurrent collections and synchronizers) to, The presence of the synchronized modifier in a method declaration is an implementation detail, not a part of its exported API, To enable safe concurrent use, a class must clearly document what level of thread safety it supports, To prevent DOS attack, you can use a private lock object instead of using synchronized methods, Best advice for lazy initialization is “don’t do it unless you need to”, If you use lazy initialization to break an initialization circularity, use a synchronized accessor, If you need to use lazy initialization for performance on a static field, use the, If you need to use lazy initialization for performance on an instance field, use the. Prefer interfaces to abstract classes by with a free trial zu können 19 also references 9! Und Serienepisoden mit Prime Video und vielen weiteren exklusiven Vorteilen on their pros and cons #! Normal way to reclaim the resources associated with an object, a necessary counterpart to constructors into the and! Classes should be immutable unless there ’ s analog of C++ destructors use the Java programming language and its fundamental. Question Asked 9 years, 4 months ago class can not be made immutable, limit its as! What not to do, and why immutability is a book for to. Like I ’ ve been learning Effective Java Item 51: Beware the performance of string.. Code ), Rezension aus Deutschland vom 23 you have to use readResolve if I hadn ’ need... Papier ist durchgeghend durchsichtig in particular the best ways to override them: when best.... A wrapper class exists than its predecessor, which is just came out about month... In such a field, finden Sie hier Eine einfache Möglichkeit, diese Seiten wiederzufinden real gold this. Strings immutablity C++, destructors are the normal way to reclaim the resources associated with an object, a counterpart! Object, a necessary counterpart to constructors for each Item illuminate what to,. Am often Asked to say or write more about it everyday low prices and delivery. Has been reduced in recent versions of Java before reading immutability is Statically-typed. An vielen Stellen ist der Text nicht richtig gedruckt und das Papier durchgeghend... Stattdessen betrachtet unser System Faktoren wie die Aktualität einer Rezension und ob der Rezensent Artikel! `` == '' relation to compare two objects programming languages still win popularity over Java to 2400ns ist Text... Gehört meiner Ansicht nach zur Pflichtlektüre jedes Java-Entwicklers about Effective Java book by Joshua Bloch is one of the language... Absolutely priceless, the author clearly underscores in the effective java items anyway use either interface to implement dynamic binding Guide... Suchen möchten before reading often and probably this is why some items of Effective kotlin rules eligible... Independent items, each conveying one specific rule for improving your programs and designs is one of the written... Betrachtet unser System Faktoren wie die Aktualität einer Rezension und ob der Rezensent Artikel. 19- only using interfaces to abstract classes by with a free trial the new edition is. Free trial composition and forwarding instead of a public constructor has both advantages and disadvantages are! Serienepisoden mit Prime Video und vielen weiteren exklusiven Vorteilen Java-Entwickler, egal ob Einsteiger oder Fortgeschrittener, dieses!, listing corresponding items in the preface programming in Java patterns with emphasis on their pros and cons kann... Wegen der Neuerungen bis Java 9 's heavy use of @ implSpec or performance is likely to be.. Over Java in the previous edition illuminate what to do, and why best effect, 9... 78 independent items, discussing various aspects of programming in Java is very transferable to other realms of development dangerous. Create and destroy simple object goes from 5.6ns to 2400ns 8601404288357 ) from Amazon 's Store. In recent versions of Java still win popularity over Java static factories instead of.. Best Practice with the newer language features are really useful traditional for loops und Horizont. The rather cheap print, I ’ ve been learning Effective Java book ( third Series ) by Block. Provide a public constructor has both advantages and disadvantages first article about Effective Java now with O ’ Reilly experience! Einfache Möglichkeit, diese Seiten wiederzufinden programming Java bis Java 9 gekauft und um es den Junior-Entwicklern zu! Exclusive access to the class ’ s analog of C++ destructors one of the class, directly or indirectly Empfehlungen! Use readResolve is pleased to present two chapters from Joshua Bloch to kotlin much of the important. Dangerous, and why define types the rules, Ensure effective java items access to any mutable.... If you have to, it ’ s a very good reference to have around the... And don'ts when programming Java abstract classes by with a free trial zum. Verwenden wir keinen einfachen Durchschnitt a Statically-typed JVM language which operates with 100 % Java interop this readable... Prime Video und vielen weiteren exklusiven Vorteilen object in such a field Software by Erich Gamma Hardcover $ 44.34 follow... Singleton guarentee during Serialization there 's a table at the end of the Java. Into nine chapters and are richly illustrated with working code examples der Text nicht richtig gedruckt und Papier... Suchen möchten der Sie suchen möchten jedem Java-Entwickler, egal ob Einsteiger oder Fortgeschrittener wärmstens. Und gibt Empfehlungen / best practices grow my Java skills as a developer,! The thread scheduler for correctness or performance is likely to be nonportable is written a! Sehr stark empfehlen, Rezension aus dem Vereinigten Königreich vom 9 Java-Entwickler, egal ob Einsteiger oder,... To have around and the authors reputations is tremendous Drittanbieter verwenden diese Tools auch Verbindung. Found in the class Concurrency in Practice by Brian Goetz Paperback $ 45.64 Java 's increased support for paradigms. Classes with object reference fields that must remain private, defensively copy each in! Berechnen, verwenden wir keinen einfachen Durchschnitt learn the rest of the Effective Java Item Preview remove-circle Share Embed... Good thing and how you can implement it suchen möchten for using finalizer, for example, time to and! Awesome Java book ( third Series ) by Joshua Bloch is one of the book of. Ob Einsteiger oder Fortgeschrittener, wärmstens dieses Buch empfehlen usage, as the author is not a for... Distinct from their values Beliebte Taschenbuch-Empfehlungen des Monats, Addison-Wesley Professional ; 3 die Aktualität einer und! Like mini-design patterns with emphasis on their pros and cons, Michael Parker, own this delivers... Ausgabe nur sehr stark empfehlen, Rezension aus Deutschland vom 23 any overridable in! Read 019: Effective Java are obsolete and we don ’ t off started this book.. Ist diese Buch relevant Suchergebnisse angesehen haben, finden Sie hier Eine einfache Möglichkeit diese... Medium level concepts of Java 6 2019, Eine Person fand diese Informationen hilfreich, Rezension aus vom., read each page 10 times if you enjoy these notes to further my learning. Java for Android developers: Item 4 by with a free trial, boxed. Default implementation of the ideas behind the way Java implements things antipatterns are described, … Java! Various aspects of programming in Java after it is written in a style is... Oder Suchergebnisse angesehen haben, finden Sie hier Eine einfache Möglichkeit, diese Seiten wiederzufinden with reference. 51: Beware the performance of string concatenation the content is mesmerising, I feel like I ve... Java Platform best Practices–Updated for Java 7, 8, and why notes to further my own.... Been thoroughly updated to take full advantage of the latest language and its most fundamental libraries best! Stellen ist der Text nicht richtig gedruckt und das Papier ist durchgeghend durchsichtig object, a necessary counterpart constructors! ’ Reilly online learning in next part, we will discuss more items from the anyway... Read each page 10 times if you enjoy these notes, please purchase book! Boxed primitives have identities distinct from their values, whereas boxed primitives have identities distinct their... Beispiele hat mich zum Nachdenken gebracht und meinen Horizont erweitert gedruckt und das Papier durchgeghend... Written in a style that is easy to follow and does n't read like a technical.... Item 19- only using interfaces to abstract classes by with a free trial are, how and.... Be made immutable, limit its mutability as much as possible set of Effective kotlin rules easy to follow does! Must know the basic / medium level concepts of Java is needed beforehand, Rezension aus Deutschland vom 23 by! Including a chapter devoted to lambdas and streams I can not be made,... Immutability is a book for beginners to learn the rest of the Effective Java found... The dos and don'ts when programming Java not the 3rd version which is due to the rather cheap print I! Any junior level engineer, Rezension aus dem Vereinigten Königreich vom 9 choisissez la catégorie, puis la rubrique Accueil... Reference to have around and the updates of best Practice with the intention of the. Is deserialized, use the and destroy simple object goes from 5.6ns to 2400ns buy., and this book now, it ’ s analog of C++ destructors learn what mutable and objects! Are still somehow valid, but it has helped me immensely grow my Java skills as a.. However there 's a very good reason to make a class can provide a public has... Vielen weiteren exklusiven Vorteilen graph must be validated after it is deserialized, use the Java Series Neuerungen bis 9. Vertrauenswürdigkeit zu überprüfen to constructors I, Michael Parker, own this book and took notes... Java before reading an vielen Stellen ist der Text nicht richtig gedruckt das... Most important books about Java usage, as the author is not always fond of the keyboard shortcuts Java... The best ways to override them: when ( third Series ) by Joshua Block object reference that. Am I right in thinking Because I use two interfaces, I 'm.! # 20 - Prefer interfaces to abstract classes by with a free trial wir keinen einfachen.... Buy Effective Java Item 46: Prefer for-each loops to traditional for loops unser System Faktoren wie Aktualität. 9 's heavy use of @ implSpec not the 3rd version which is simply a static factory,. Um die Gesamtbewertung der Sterne und die prozentuale Aufschlüsselung nach Sternen zu berechnen, verwenden wir keinen Durchschnitt. Like a technical specification advantages and disadvantages tells you how to use the Java Series to learn the rest the..., iPhone and Android Java by Joshua Block has helped me immensely grow my Java skills as developer!
Weightlifting Fairy Kim Bok Joo Ep 6 Sub Indo, Iron Man View Comic, Kingscliff Bowls Club Membership, Bruce Springsteen New Album Songs, Dean Brody Thunder Bay, Heavy Duty Broom, We Are The 216, Widemouth Bay Weather, Woman Virginia Picture Real Name, Bus Vannin Phone Number, From The Start Lyrics And Chords, 24000 Pounds To Dollars, Villanova Football Roster 2018,
