Joining string array together, from certain argument, into a string?

Question

Here is my String array containing the following:

"message" "player" "how" "are" "you"

I am wanting to join the "how" "are" "you" part of the String[] and I am currently doing the following:

String msg = "";

for (int i = 2; i < args.length; i++)
{
    msg = msg + args[i] + " ";
}

Util.messagePlayer(player, msg);

So my question is, is there a better/more efficient way of doing this?

instead of `String` use `StringBuilder`. – Azodious Dec 29 '16 at 11:42 — Azodious, Dec 29 '16 at 11:42

score 1 · Accepted Answer · edited May 23 '17 at 11:53

1

Yes, there is a better way, everytime you are iterating that array, new String objects are getting created(because Strings are immutable), however this one is a short String, so the efficiency loss is not that considerable,still try to use StringBuilder instead

StringBuilder msg = new StringBuilder();

for (int i = 2; i < args.length; i++)
{
    msg.append(args[i] + " ");
}
Util.messagePlayer(player, msg.toString);

For complete details, StringBuilder vs String concatenation in toString() in Java

edited May 23 '17 at 11:53

Community

1
1

answered Dec 29 '16 at 11:47

nobalG

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Works, although msg needs to be: `StringBuilder msg = new StringBuilder();` – Dec 29 '16 at 11:51

score 0 · Answer 2 · edited May 23 '17 at 12:24

0

String objects are immutable ones in Java, hence every time you concatenate two strings, you are creating a new Object this is costly.

Instead, you can use a StringBuilder.

More about how to use it is well described here: Correct way to use StringBuilder

edited May 23 '17 at 12:24

Community

1
1

answered Dec 29 '16 at 11:46

sandor

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Joining string array together, from certain argument, into a string?

2 Answers2