4、如果对象的equals方法被重写,那么对象的hashCode也尽量重写,并且产生hashCode使用的对象,一定要和equals方法中使用的一致,否则就会违反上面提到的第2点; 5、两个对象的hashCode相同,并不一定表示两个对象就相同,也就是不一定适用于equals(java.lang.Object) 方法,只能够说明这两个对象在散列存储结构中,如Hashtable,...
hbm2java generates a default implementation of equals() and hashcode() which relies on id comparison. After all hbm2java has no way to know your unique buisness key. Often, you will want plain old Java equality rather than persistent-id equality; there is aJIRA issuethat you can vote for...
packagemytest;importjava.time.LocalDate;importjava.util.Arrays;importjava.util.Comparator;classPerson{publicPerson(String name, LocalDate birthday){this.name = name;this.birthday = birthday; } String name; LocalDate birthday;publicLocalDategetBirthday(){returnbirthday; }// 字符串的对比用如下方法publ...
types that provide a suitable implementation of the hashCode() and equals(Object) methods. You can define a primary key in one of the following ways (in either case, for an entity bean with bean-managed persistence, you create the primary key in the ejbCreate method): Define the type of...
Updated information about hashCode and equals. Added a bios page that contains information about our contributing authors. Reviewed and edited internationalization, reflection, and native trails. Fixed miscellaneous typos and broken links. Improved some text and some examples.Nettle...
If they are not equal in terms of equals() then they might or might not return the same hashCode() - if the hashCode() is well written then the chance of non-equal objects returning the same hashCode() should be low, but doesn't have to be zero. Also, if at all possible, an ...
equals(): It looks to see if one thing is the same as another. The basic structure goes like this: Syntax: equals(Object element): boolean hashCode(): It gives you the collection's hash code as an answer. It returns an integer value. This strategy can be stated generally as follows:...
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Set the unsupportedReason property: The explanation about why the resource is unsupported by What-If. Methods inherited from java.lang.Object cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait Constructor Details WhatIfChange public WhatIfChange() ...
A string representation of this object. See Also: Object.toString() equals public boolean equals(Object obj) Overrides: equals in class Object hashCode public int hashCode() Overrides: hashCode in class Object clone public CreateWhatIfForecastExportResult clone() Overrides...