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What are difference in different notations of String array in main method?

I've used three types of notation while passing argument to main method in java.

public static void main(String[] args)
public static void main(String args[])
public static void main(String... args)

Can anyone tell me the difference between above? Someone has used terms packed and non-packed data for explanation of first two, what are they, and is it related to these?

I think first two is somewhat related to coding convention. Am I right?

Solution

  • There is no actual difference, the variants are due to the different ways you can define an array in java syntax.

    • The standard way to define and array

      String[] args

    • C/C++ style exist from historical reasons

      String args[]

    • Varargs style (When do you use varargs in Java?)

      String… args

    All will compile to the same bytecode. I would stick with 

    public static void main(String[] args)