Hello MyBatis, here is a bug for inserting objects of List which overrides hashcode method and the key uses as hashcode identifier (like id) is null. Person overrides hashcode by id , id is null, ...

The hashCode() and equals() methods have been defined in Object class which is parent class for all java classes. For this reason, all java objects inherit a default ...

In this blog post, I briefly look at the System.identityHashCode (Object) method. The Javadoc documentation for System.identityHashCode (Object) states: Returns the same hash code for the given 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 ...