ADDITIONAL SYSTEM INFORMATION :
The JVM array objects and java.util.ArrayList., HashMap, HashSet should support long indexes and array sizes

A DESCRIPTION OF THE PROBLEM :
The JVM array objects and ArrayList., HashMap, HashSet should support long indexes and array sizes. This should be a trivial change, and makes sense when most PCs can work with 256GB and servers can go much higher. Existing int driven code will cast automatically to long, but there would be user code changes in variables that catch returned index or size. If the user impact is too great, new classes with access to larger arrays would suffice.