How to run though a list of Integer's and do the same Algorithm

List<Integer> list; //Initialize it
int size = list.size();
for(int i = 0; i < size; i++)
{
Integer value = list.get(i); //Get the value at index
value += 10; //Algorithm: add 10
list.set(i, value); //Set the new value at index
}

 

A for each loop would be the preferred way.
And also please use code tags^^

 

Yes, but we need the index to set the new value.

 

What about starting a task when a Player X joins and then every hour, you can get the Bank of the player and add some money to it... Don't forget to cancel the task, when the player leaves...

 

Use a For-Each and then have a integer field that starts at zero as a counter.

 

Maybe this helps a bit: http://stackoverflow.com/questions/18410035/ways-to-iterate-over-a-list-in-java

 

Java programmers really do not know how to write an incrementing/decrementing loop? Incredibly sad.

Backwards iteration. Also safe to use this to delete list entries inside the loop (which is impossible for for-each or forward iteration)

Code (Java):

int len = somearray.length; ( or list.size(); )
while(--len>-1)
{
    somearray[len].stuff();
    // do a thing
}

Forward interation. slightly more complex.

Code (Java):

int len = somearray.length; ( or list.size(); )
int index = -1;
while(++index<len)
{
    somearray[index].things();
    // do a thing
}

 

Use a mutable integer type...?

 

People do not know for loops:

Code (Text):

for(int i = 0; i < array.length, i++){
    //Do stuff
}

(This may be more code but its 1. easier to read and 2. takes the same amount of time from a bytecode level of perspective.)

 

I'm not sure if I've understood this correctly, but wouldn't a Map be more suitable?

Considering each player have a bank, the map would look like UUID, Integer (or something like that).

It would be easy to loop through (you could even just get a player's bank directly and set value).

 

Not all Java programmers, new Java programmers, give the guy a break.

 

while and for loops used to be part of what people learned before they even wrote their first piece of code.. I guess that is too much to expect in the modern world of API-spoonfeeding and shortcuts.

 

Minecraft server plugin development is not really a good place to start learning Java, because @FlyingLlama is correct above, that many projects that programmers work on do not APIs that you can call.

But yeah, @TheMasteredPanda,
you really need to do some research and not give up so easily, what you are
asking is incredibly simple, so search Google, struggle for a awhile, then ask for help.

Struggle like the rest of us once did.