Why is list.size()>0 slower than list.isEmpty() in Java? On other words why isEmpty() is preferable over size()>0?
When I look at the implementation in ArrayList, then it looks like the speed should ... |
I am calculating a large number of possible resulting combinations of an algortihm. To sort this combinations I rate them with a double value und store them in PriorityQueue. Currently, there ... |
In java, there is a List interface and size() method to compute the size of the List. when i call List.size(), how does it count? is it counted linearly? or the ... |
I am having a problem changing a List that has a set-size in Java.
I understand that I can't add or remove from this list but why can't I use set?
When ... |
Why does this not work?
if ((List)query.execute().size() > 0)
Since execute() returns a List, I thought I could call the size() method on it?
|
Possible Duplicate:
How many data a list can hold at the maximum
What is the maximum number of elements a list can hold?
|
I'm a fairly new to Java and to programming, so excuse me if this is a stupid question.
I want to create a method exceptionchecker that does this
public void exceptionchecker(Object check){
...
|
|
is it possible to define a list with a fixed size that's 100? If not why isn't available in Java?
|
public static <T> List<T> repeat(T contents, int length) {
List<T> list = new ArrayList<T>();
for (int i = 0; i < length; i++) {
...
|
Even if it's easy to make an handle make, but I wonder if there is any famous helper help to get the size of a list or to get the last ... |
Say, I want to create a list quickly which contains 1000 elements. What is the best way to accomplish this?
|
// A list you got somewhere List list = ...; // The question: Why use an iterator, like this...: for (Iterator i = list.iterator(); i.hasNext(); ) { Object element = i.next(); // do something } // ... instead of this: for (int i = 0; i < list.size(); i++) { Object element = list.get(i); // do something } |
|
|
|
|
|
|
|
|
|
You already know that this is not the correct forum for Swing questions. You even once used the Swing forum. Please in future post your Swing questions into the Swing forum. You seem to be confused about what selected means. Selected means the items of the Jlist that are selected (highlighted, mouse clicky etc by the user) not all the items ... |
|
|