3.1、测试一:覆盖equals()但不覆盖hashCode(),导致数据不唯一性。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicclassHashCodeTest{publicstaticvoidmain(String[]args){Collection set=newHashSet();Point p1=newPoint(1,1);Point p2=newPoint(1,1);System.out.println(p1.equals(p2));set.add...
using the constants 31, 33, 37, 39, and 41 will produce less than 7 collisions in each case. Knowing this, it should come as no surprise that many Java implementations choose one of these constants.
markOop.hpp 代码语言:javascript 代码运行次数:0 运行 AI代码解释 30// The markOop describes the header of an object.31//32// Note that the mark is not a real oop but just a word.33// It is placed in the oop hierarchy for historical reasons.34//35// Bit-format of an object header...
(3)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; (4)两个对象的HashCode相同,并不一定表示两个对象就相同,也就是equals方法不一定返回true,只能够说明这两个对象在散列存储结构中,如Hashtable,他们存放在同一个...
Java testing framework for testing pojo methods. It tests equals, hashCode, toString, getters, setters, constructors and whatever you report in issues ;) testingjava-frameworkequalitytest-automationtestshashcodetest-coveragepojoconstructorsettersgetterspojosequalspojo-testingpojo-testertostring ...
Sign UpSign In hashcode1.0.3 • Public • Published 11 years ago Readme Code Beta 0 Dependencies 37 Dependents 2 Versions Hashcode Hashcode is originaly developed by Stuart Bannerman (me@stuartbannerman.com). It's a simple JavaScript module for generating hashcodes (integer representations) of...
代码语言:javascript 复制 importjava.io.BufferedReader;importjava.io.InputStreamReader;importjava.io.IOException;importjava.util.Collection;importjava.util.HashMap;importjava.util.HashSet;importjava.util.Map;importjava.util.Set;importjava.util.TreeSet;importjava.nio.charset.StandardCharsets;publicclassHash...
* used in {@codeequals} comparisons on the object is modified. * This integer need not remain consistent from one execution of an * application to another execution of the same application. * If two objects are equal according to the {@codeequals(Object)} * method...
equals()跟hashcode()都可以用来比较对象。hashcode通过不同对象有不同的散列码来比较两个对象。 hashcode方法把对象放到一个对象容器进行查找,算法好坏直接影响容器的存取效率。 HashCode() is explicitly used in methods where hash functions are used, like hashTable() etc. ...
Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistentlyreturnthe same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution ...