Quotes from Effective Java Programming Language Guide

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“One advantage of static factory methods is that, unlike constructors, they have names.”
― quote from Effective Java Programming Language Guide


“Learning the art of programming, like most other disciplines, consists of first learning the rules and then learning when to break them.”
― quote from Effective Java Programming Language Guide


“Collection or an appropriate subtype is generally the best return type for a public, sequence- returning method.”
― quote from Effective Java Programming Language Guide


“Writing concurrent programs in Java keeps getting easier, but writing concurrent programs that are correct and fast is as difficult as it ever was.”
― quote from Effective Java Programming Language Guide


“A second advantage of static factory methods is that, unlike constructors, they are not required to create a new object each time they're invoked.”
― quote from Effective Java Programming Language Guide



“If you export a nontrivial interface, you should strongly consider providing a skeletal implementation to go with it. To the extent possible, you should provide the skeletal implementation via default methods on the interface so that all implementors of the interface can make use of it.”
― quote from Effective Java Programming Language Guide


“Implementing a constant interface causes this implementation detail to leak into the class’s exported API. It is of no consequence to the users of a class that the class implements a constant interface. In fact, it may even confuse them. Worse, it represents a commitment: if in a future release the class is modified so that it no longer needs to use the constants, it still must implement the interface to ensure binary compatibility. If a nonfinal class implements a constant interface, all of its subclasses will have their namespaces polluted by the constants in the interface.”
― quote from Effective Java Programming Language Guide


“You can put any element into a collection with a raw type, easily corrupting the collection’s type invariant (as demonstrated by the unsafeAdd method on page 119); you can’t put any ele- ment (other than null) into a Collection<?>.”
― quote from Effective Java Programming Language Guide


“arrays are covariant. This scary-sounding word means simply that if Sub is a subtype of Super, then the array type Sub[] is a subtype of the array type Super[]. Generics, by contrast, are invariant: for any two distinct types Type1 and Type2, List is neither a subtype nor a supertype of List. You might think this means that generics are deficient, but arguably it is arrays that are deficient.”
― quote from Effective Java Programming Language Guide


“A forEach operation that does anything more than present the result of the computation performed by a stream is a “bad smell in code,” as is a lambda that mutates state.”
― quote from Effective Java Programming Language Guide



“streams do not make iteration obsolete”
― quote from Effective Java Programming Language Guide


“premature optimization is the root of all evil. —Donald E. Knuth [”
― quote from Effective Java Programming Language Guide


“In other words, it is about 50 times slower to create and destroy objects with finalizers.”
― quote from Effective Java Programming Language Guide


“In fact, two-thirds of the uses of the close method in the Java libraries were wrong in 2007.”
― quote from Effective Java Programming Language Guide


“There is no way to extend an instantiable class and add a value component while preserving the equals contract, unless you’re willing to forgo the benefits of object-oriented abstraction.”
― quote from Effective Java Programming Language Guide



“Given all the problems associated with Cloneable, new interfaces should not extend it, and new extendable classes should not implement it.”
― quote from Effective Java Programming Language Guide


“It is too early to say whether modules will achieve widespread use outside of the JDK itself. In the meantime, it seems best to avoid them unless you have a compelling need.”
― quote from Effective Java Programming Language Guide


“Builder pattern is more verbose than the telescoping constructor pattern, so it should be used only if there are enough parameters, say, four or more.”
― quote from Effective Java Programming Language Guide


Popular quotes

“Bless the Lord, O my soul; and all that is within me, bless His holy name! Bless the Lord, O my soul, and forget not all His benefits: who forgives all your iniquities, who heals all your diseases, who redeems your life from destruction, who crowns you with loving kindness and tender mercies—Psalm 103:1–4”
― quote from The MacArthur Daily Bible: Read through the Bible in one year, with notes from John MacArthur


“From time immemorial, some men supposed to deal in one-valued 'eternal verities'. We called such men 'philosophers' or 'meta-physicians'. But they seldom realized that all their 'eternal verities' consisted only of words, and words which, for the most part, belonged to a primitive language, refleting in its structure the assumed structure of the world of remote antiquity. Besides, they did not realize that these 'eternal verities' last only so long as the human nervous system is not altered. Under the influence of these 'philosophers', two-valued 'logic', and the confusion of orders of abstractions, nearly all of us contracted a firmly rooted predilection for 'general' statements - 'universals', as they were called - which in most cases inherently involved the semantic one-valued conviction of validity for all 'time' to come.”
― Alfred Korzybski, quote from Science and Sanity: An Introduction to Non-Aristotelian Systems and General Semantics


“We're not supposed to touch the dead. This is why we make a comfortable afterlife for them, so they will not reach out. We hope to distract them, keep them busy. Burial is a hope.”
― David Vann, quote from Goat Mountain


“We parked behind the building and came through the less utilized handicapped entrance. Mom had rods and screws molded to her spine from a work injury years prior. She was a walking tin man, awkward gait included, guaranteed to set off the annoying alarm on the metal detectors. They waved a wand over her instead. She would nod and apologize for the inconvenience to the guards, but the smirk on her face absorbed all the pitied glances thrown her way. Stroudsburg”
― K.L. Randis, quote from Spilled Milk


“The odds is gone, and there is nothing left remarkable beneath the visiting moon,”
― Georgina Guthrie, quote from The Weight of Words


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BookQuoters is a community of passionate readers who enjoy sharing the most meaningful, memorable and interesting quotes from great books. As the world communicates more and more via texts, memes and sound bytes, short but profound quotes from books have become more relevant and important. For some of us a quote becomes a mantra, a goal or a philosophy by which we live. For all of us, quotes are a great way to remember a book and to carry with us the author’s best ideas.

We thoughtfully gather quotes from our favorite books, both classic and current, and choose the ones that are most thought-provoking. Each quote represents a book that is interesting, well written and has potential to enhance the reader’s life. We also accept submissions from our visitors and will select the quotes we feel are most appealing to the BookQuoters community.

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