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So, if the k.hashCode() returns Integer.MIN_VALUE, the variable i is negative and the code tries to access element of array with negative index resulting into index out of bounds. In my case, the ...

OK, there's a hashCode that ends in zero -- we'll put it into bucket zero. Here's a hashCode that ends in three -- we'll put it into bucket three. All of a sudden, you get another object. It says it's ...

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