string to array / array to string

This may sound very noobish, but bear with me!
How do i split a string into a sting array?

TL;DR:
String msg to String[] samemsg

 

String[] samemsn = msg.split(regex);

The regex is where it splits.
msg = herp, derp, flurp
Regex = ", "
Output:
msg[0] = herp
msg[1] = derp
msg[2] = flurp

 

@Randy Schouten
thanks

Do you know how to put an array back to a string?

like msg[0] + msg[1] + msg[2]...

TL;DR:
String array to single String

 

To convert it back to a single String, I would do something like this:

Code:java

StringBuilder sb = new StringBuilder();
for(String s : yourStringArray) {
    sb.append(s);
}
String newString = sb.toString();

 

Code:

public String arrayToString(String[] arr) {
    String temp;
    for (String i : arr) {
        temp+=i;
    }
    return temp;
}
 

That should work, but I haven't tested it.

 

@DrAgonmoray That'd work, but you'd really be creating (arr.length + 1) String objects. Not exactly memory efficient.

 

if i say, wanted to start at the 3nd part of the array, msg[2], how would that be done?

@escape
Do you know of a more efficient way ?

 

@stelar7 You could still use the same method I posted but change it to:

Code:java

StringBuilder sb = new StringBuilder();
for(int i = 0 /*<-- Set to the index to start at*/; i < array.length; i++) {
    sb.append(array.get(i));
}
String newString = sb.toString();

 

@escape
sb.append(array.get(i));
gives me an error...
Cannot invoke get(int) on the array type String[]

does sb.append(array[ i ]) work instead?

 

Whoops it should be

Code:

sb.append(array[i]); 

And nope, only if it was a char array.

 

@escape
that's what i tough wrote

Mind telling me why this wont work?
do i need to use OnCommand?

Code:java

public class MainPlayerListener extends PlayerListener {
    public static Main plugin;
 
    String temp;
 
    public MainPlayerListener(Main instance) {
        plugin = instance;
    }
 
    public void onPlayerChat(PlayerChatEvent event) {
        String message = event.getMessage();
        String[] messageS = message.split(" ");
        String sender = event.getPlayer().getName();
        Player reciver = findPlayerByName(messageS[1]);
        if (reciver == null) {
        event.getPlayer().sendMessage(ChatColor.RED + "Player not online!");
        }
 
        if (messageS[0].equalsIgnoreCase("/m")) {
            temp = arrayToString(messageS);
            reciver.sendMessage(ChatColor.GREEN + sender + ": " + temp);
        }
    }
 
    private Player findPlayerByName(String playerName) {
        for (Player player : Bukkit.getServer().getOnlinePlayers()) {
            if (player.getName().equalsIgnoreCase(playerName)) {
                return player;
            }
        }
        return null;
    }
 
    public String arrayToString(String[] array) {
 
        StringBuilder sb = new StringBuilder();
            for (int i = 2; i < array.length; i++) {
                sb.append(array[i]);
            }
        String newString = sb.toString();
        return newString;
    }
}[/i]

 

You didn't have the [ i] before though

 

@escape
I know... STUPID forum changed it to an italic tag -.-"

 

Haha I know it did that to me too.