What are true properties of Java ArrayLists.

$1.$The default size is $0$

$2.$You can use add$()$ to put primitive tyles in them.

$3.$There is a helper library with extra methods to help you do operations.

$4.$When initialized it is filled with a default value $($depending on its type$).$

$5.$You can use add$()$ to put object types in them.$6.$There are built$-$in methods for things like contains$($Object o$).7.$You can change their size.$8.$You can slice them, like in python, with $[$l syntax to get a subsequence of the array.