varargs

varangs is variable arguments. varangs as name suggest allows a method to have 0 or mutiple argument.

Autoboxing

Autoboxing is converting primitive data type into it's equivalent wrapper type class automatically in Java.E.g: int primitive type is converted to Integer Wrapper class in autoboxing.

Program of Autoboxing where boxing beats varargs:

class Boxing3
{  
  static void m(Integer i)  //overloaded method with wrapper type as parameter
  { 
    System.out.println("Integer");
  }  
    static void m(Integer... i) //overloaded method with varargs
  {
    System.out.println("Integer...");
  }  
  
  public static void main(String args[])
  {  
   int a=30;  
   m(a);  
 }   
}  

Output:

Integer

In above program when overloaded method m is called from main with int primitive type value as parameter the function m with wrapper type Integer is called because there is not method with int primitive type but method with Integer wrapper type is available therefore int is automatically converted to Integer i.e boxing is performed. Boxing is given preference over varargs i.e m method with varargs is not called.