java - Tricking the JVM into casting arrays -

i'd know there way cast array of supertype , array of subtype. so:

subtype[] subarray = (subtype[])somesupertypearray; 

i know @ runtime throws classcastexception. way convert array copy array. in case, copying not option.

can trick jvm beliving cast valid, , bypass class type checks? creating reference array of supertype, through seen subtype array. (possibly facing dangers of unexplainable errors)

if define array like

supertype[] array = {element1, element2}; subtype[] array2 = (subtype[]) array; 

it not work, can this:

supertype[] array = new subtype[]{element1, element2}; subtype[] array2 = (subtype[]) array; 

you have make sure field array has array of subtype when you're casting it.