对计算机专业的学生而言，哈希算法在大学数据结构课程中曾有所接触，但随着时间推移，多数人逐渐淡忘了相关内容。工作后由于实际应用较少，也未能深入研究。直到某天在项目开发中，发现有人同时重写了hashCode和equals方法，才引发思考：hashCode到底是什么？

If you are fortunate enough to be using JDK 7, the newly available Objects class is the obvious (at least to me) choice for implementing the “common” Java object ...

I previously blogged on the Apache Commons ToStringBuilder and discussed how it takes away much of the tedium normally associated with implementing toString methods. While implementing toString() does ...