Separating Array indexes with a comma

I have getOnlinePlayers(); stored in a String[], and I want to output them on the screen like so:

player1, player2, player3

Notice how each player is separated with a comma, but the last one is not. I know it can be done, but I haven't run across any functions that would allow me to do so. Any help would be appreciated.

EDIT: I already know I need a for loop to output it as a string, there's no need to include that.

 

Out of my head

Code:

String newString = "";
for (String s : stringArray) {
    newString += s + ", ";
}
if (newString.length() > 0) {
    newString = newString.substring(0, newString.length() - 2);
}

The part you want is the substring part.

 

Why does it need to be -2? The extra space at the end?

 

-2 because of the text ", " that is being added at the end. Maybe it's -1 (because of how indexes work,) but just test it out

Array = "Player1", "Player2"
newString before the substring will be "Player1, Player2, "
The substring removes the last two characters so it will be "Player1, Player2"

 

-2 seems to work just fine, it removes the comma and the space at the end. Thanks for the help.

 

Just give me a like or something. I'm happy I could help!

 

Don't use string concactenation inside for loops. It's very inefficient.

Use StringBuilder, or perhaps even easier, Joiner:

Code:

String newString = Joiner.on(", ").join(Bukkit.getServer().getOnlinePlayers());

Joiner comes from the Guava library, which is included in Bukkit.

 

There... Learned something new! Thanks @desht !

 

Code:

String str="";
for(Player player : getOnlinePlayers()) {
str += player.getName()+",";
}

log.info(str);

Think this should work

 

Not really. You would have an unneeded , after the last player.

 

Not to mention that it's four lines of code where one would do, and it's efficiency is O(n^2) instead of O(n). See my previous post.