Extremely fast set difference, intersection, symmetricDifference, union operations on Sets and Arrays. All the standard map/reduce/find operations for Sets. CartesianProduct as a first class object ...

For Java, the default value of an array is an empty ArrayList as soon as it is declared as "required" in the enclosing object. In our case, we must reject the null value with the appropriate ...

As a type-safe program language, Java requires bounds checks of array accesses. Whenever an array element is accessed, a cmp (compare) instruction is executed to check whether the index value is ...

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions.