Asksearch_php.cn

Community Learn Tools Library Leisure

English

Popular searches：
PHP
MySQL
jquery
HTML
CSS

java - ArrayList memory allocation, cross-generation reference gc issue

What is the memory allocation of ArrayList in JVM? {Code...} Continuously add BigObject, is its reference relationship as follows? Then ygc occurs. Did BigObject enter the old area? If the arrayList object does not enter the old area, wouldn't there be a cross-generation reference? If you enter,...

黄舟 2017-05-17 10:07:27

java - The set(int index, E element) method in ArrayList does not need to be synchronized in the case of multi-threading

I know that ArrayList is a thread-unsafe class. In multi-threaded situations, add() and remove() cannot be performed directly, but can I use the set(int index, E element) method, {code...}

为情所困 2017-05-27 17:40:40

java - I encountered a ResultSet result set problem, please look at the code?

The code in question is as follows: public ArrayList<menuentity> getMenuList(Connection con){ {code...} Phenomenon description: System.out.println("new ArrayList<menuentity>();") can be executed in this method ;, but the while loop...

ringa_lee 2017-05-17 10:07:26