equals 和 hashCode 方法是 Java 中 Object 类的两个关键方法，用于对象比较和哈希表操作： 契约一致性：确保 equals 和 hashCode 满足 Java 的契约。 二、eq… ...

equals (Object otherObject) – verifies the equality of two objects. It’s default implementation simply checks the object references of two objects to verify their equality. By default, two objects are ...

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As Java SDK suggests, you should override hashCode() too when you override equals(). This speeds up your code a bit, and most importantly, your code will not produce compiler warnings.

In this post, I look at using Guava ‘s Objects class to implement the three common methods equals, hashCode, and toString().

Obi Ezechukwu 's blog High-Octane Java recently featured the post Compact Equals , which compares an implementation of a Java class's overridden equals method in traditional form versus one ...