【JAVA】hashcode() &　equals()

【【JAVA】hashcode() &　equals()】的更多相关文章

【JAVA】hashcode() &　equals()

平时使用map时都是用JAVA原生的类型,所以很少关注到hashcode()和equals()的方法的内部实现.近期实现一个小工具,涉及到自己写的类的查找比对,又再次重温了相关的知识. 上简单示例代码,比对自己覆写和不覆写的差异不覆写hashcode()和equals(): import java.util.HashMap; import java.util.Map; public class HashCode_Equals { public int a; public int b; publ…

【Java】hashcode()和equals()

大家知道,在集合中判断集合中的两个元素是否相同,依赖的是hashcode()和equals()两个方法. > 一个简单的实验 public class Teacher { private Integer id = null; public Teacher(Integer id) { super(); this.id = id; } @Override public String toString() { StringBuilder builder = new StringBuilder(); b…

【Java】 hashcode()和System.identityHashCode()

hashcode()和System.identityHashCode() openjdk8: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/5b86f66575b7 最近在看Spring源码的过程中看到这么一行 @{link org.springframework.context.support.AbstractApplicationContext} public AbstractApplicationContext() { this.logge…

【Java】-NO.16.EBook.4.Java.1.008-【疯狂Java讲义第3版李刚】- 集合/容器

1.0.0 Summary Tittle:[Java]-NO.16.EBook.4.Java.1.008-[疯狂Java讲义第3版李刚]- 集合 Style:EBook Series:Java Since:2017-09-22 End:.... Total Hours:... Degree Of Diffculty:2 Degree Of Mastery:2 Practical Level:2 Desired Goal:2 Archieve Goal:.... Gerneral Evaluat…

【Java】-NO.12.Java.2.OCJP.1.001-【Java OCJP】-

1.0.0 Summary Tittle:[Java]-NO.12.Java.2.OCJP.1.001-[Java OCJP]- Style:Java Series:OCJP Since:2017-05-12 End:.... Total Hours:... Degree Of Diffculty:8 Degree Of Mastery:8 Practical Level:8 Desired Goal:8 Archieve Goal:.... Gerneral Evaluation:... Wr…