java - Curious with ++ and double casts -

so again looking @ code , found this.

   public prototableshapedrecipe addrecipe(itemstack stack, object ... varargs){    int = 0;    ...    ...    ...    string[] astring = (string[])((string[])varargs[i++]);    } 

the thing wondering why there need 2 casts of string[] , when comes passing variable i varargs[] considered value 1 , making i 1 or adding 1 i when being passed , i stays @ 0.

in reverse order, first i value used in array index (so varargs[0]) , i incremented on next line i 1.

next, because varargs or type object[]. it's safe use cast if takes string[](s) (and forgot opening {). like

public prototableshapedrecipe addrecipe(itemstack stack,         string[]... varargs) {     int = 0;     // ...     string[] astring = varargs[i++]; // <-- varargs[0]     // = 1 }