In Java:

Override toString$()$ for both implementations of StackADT, where the top value will be

printed on the left.

toString$()$ do not change the internal state of the stack.

In example:

StackADT arrS $=$ new AStack$(5)$;

arrS.push$(1)$;

arrS.push$(2)$;

arrS.push$(3)$;

arrS.push$(4)$;

arrS.pop$()$;

System.out.println$($arrS$)$;

$//$ Should print: $321$

StackADT listS $=$ new LStack$(5)$;

listS.push$(10)$;

listS.push$(20)$;

listS.push$(30)$;

listS.push$(40)$;

listS.pop$()$;

System.out.println$($listS$)$;

$//$ Should print: $302010$