Is there any performance loss

Question

public class Mayank {

public static void main(String ...aa){
  System.out.println("Yes it is working");
       }
}

Is there any decrease in efficiency of program,if we use this syntax.

Why it support variable arguments and why we generally not use it in main methos.Any specific reason. — Innovation, Dec 19 '13 at 08:07

score 5 · Accepted Answer · edited Dec 19 '13 at 08:07

5

It's not showing you a compilation error, because although the formatting is all over the place, the code is syntactically correct.

BTW The String... is an ellipsis which is like a String[] and is fine to use. (I prefer it)

I would get your IDE to format it like this

public class Mayank {
    public static void main(String... ignored) {
        System.out.println("Yes it is working");
    }
}

edited Dec 19 '13 at 08:07

Bathsheba

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answered Dec 19 '13 at 08:04

Peter Lawrey

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score 1 · Answer 2 · edited May 23 '17 at 11:58

1

because there is nothing wrong with the code.

You can refer to this Q&A to get a clear view. public static void main(String arg[ ] ) in java is it fixed?

edited May 23 '17 at 11:58

Community

1
1

answered Dec 19 '13 at 08:08

palayan

59
6

SpringLearner · Answer 3 · 2013-12-19T08:18:14.013

main method in java accepts String array arguments so all the following are valid types

public static void main(String ...aa){


public static void main(String[] aa){


public static void main(String []aa){


public static void main(String aa[]){

public static void main(String [] aa){

As per your updated post varargs means variable arguments.If you are not sure how many arguements you want to pass then you can use varargs.

Note that varargs only support java 5 onwards.So if you are using java version older than 5 then this will definitely show you error

score 0 · Answer 4 · answered Dec 19 '13 at 08:54

0

main(String... args) can just run in jdk1.5+,and main(String[] args) can run in each version.and is there 's any difference as u never call the method directly?

answered Dec 19 '13 at 08:54

Grumpy

1

Is there any performance loss

4 Answers4