Dog should be an abstract class. The correct syntax for this is: abstract class Dog { Poodle should extend Dog (not implement).

table.length is 3. So the do-while loop will run 3 times with ii=0, ii=1 and ii=2.
The second while statement will break the do-loop when ii = 3.
Note: The Java programming language provides a do-while statement, which can be
expressed as follows:
do {
statement(s)
} while (expression);