java - Confused at to why this arraylist code is not working? Includes alist.removeLast(); -


anyone know code does?

i confused, , doesn't work reason though in textbook.

here array list:

   arraylist<integer> alist = new arraylist<integer>();     while(!alist.isempty()){       alist.removelast();   }

the alist.removelast(); piece of code has error in it

im not sure piece of code supposed , how work.

if exact code in textbook, textbook wrong. arraylist.removelast() not exist. however, linkedlist.removelast() exist.

and looks method taking strange approach emptying list.


Comments

Post a Comment

Popular posts from this blog

Java sticky instances of class com.mysql.jdbc.Field aggregating -

i noticed (via jmap+jhat) app leaking storing many instances com.mysql.jdbc.field  class - double checked code make sure closing preparedstatements, find few missing didn't change outcome. - preparedstatement created , closed right away - several others created @ start , reused many times - using org.apache.tomcat.jdbc.pool.datasource connection pool what can cause type of behavior? are closing of preparedstatements / result sets using: preparedstatement stmt (possible assignment here); try { // work prepared statement resultset rs; try { while (rs.next()) ... // process results } { rs.close(); } } { stmt.close(); } so guarantee result sets closed when finished (regardless of exceptions) , statements closed (regardless of exceptions)? there other ways write that, idea same. if you're doing of properly, unless have many references it's taking inordinate amount of memory, it's ok , nothing needs done it.
Read more