As you can see the Guava version is shorter and avoids superfluous helper objects. In case of equals, it even allows for short-circuiting the evaluation if an earlier Object.equal() call returns false (to be fair: commons / lang has an ObjectUtils.equals(obj1, obj2) method with identica...
The equals() method compares two strings, and returns true if the strings are equal, and false if not.Tip: Use the compareTo() method to compare two strings lexicographically.Syntaxpublic boolean equals(Object anotherObject) Parameter Values...
译者注:你可能会觉得Java很简单,Object的equals实现也会非常简单,但是事实并不是你想象的这样,耐心的读完本文,你会发现你对Java了解的是如此的少。如果这篇文章是一份Java程序员的入职笔试,那么不知道有多少人会掉落到这样的陷阱中。原文转自http://www.artima.com/lejava/articles/equality.html三位作者都是不同...
Unlike {@link * #compareTo(BigDecimal) compareTo}, this method considers two * {@code BigDecimal} objects equal only if they are equal in * value and scale (thus 2.0 is not equal to 2.00 when compared by * this method). * * @param x {@code Object} to which this {@code BigDecimal...
It is much better to use Java’s utility methodObjects.equals(or, if you’re not yet on Java 7, Guava’sObjects.equal): returnObjects.equals(firstName,person.firstName)&&Objects.equals(lastName,person.lastName); It does exactly the same checks but is much more readable. ...
ComparesthisBigDecimalwiththe specified Objectforequality.Unlike compareTo,thismethod considers two BigDecimal objects equal onlyifthey are equalinvalue andscale(thus2.0is not equal to2.00when compared bythismethod) 大概意思就是,equals方法和compareTo并不一样,equals方法会比较两部分内容,分别是值(value)和...
NEW in Lombok 0.10: 除非你的类是final类型并且只是继承至java.lang.Object, 否则lombok会生成一个canEqual方法,这以为着JPA代理仍然可以等于他们的基类,但是添加新状态的子类不会破坏equals契约。下文解释了为什么需要这种方法的复杂原因:How to Write an Equality Method in Java。如果层次结构中的所有类都是scala ...
* Cache to support the object identity semantics of autoboxing for values between * -128 and 127 (inclusive) as required by JLS. * * The cache is initialized on first usage. During VM initialization the * getAndRemoveCacheProperties method may be used to get and remove any system ...
上面的三步也是<Effective Java>中推荐的步骤,基本可保证万无一失. 如何重写hashCode()方法 在JavaSE 7 Specification中指出, "Note that it is generally necessary to override the hashCode method whenever this method(equals) is overridden, so as to maintain the general contract for the hashCode method,...
Equals Method Reference Feedback DefinitionNamespace: Java.Util Assembly: Mono.Android.dll Overloads展開資料表 Equals(Byte[], Int32, Int32, Byte[], Int32, Int32) Returns true if the two specified arrays of bytes, over the specified ranges, are equal to one another. Equals(Char[], ...