Groovy Boxing and Unboxing

class Example { 
   static void main(String[] args) {

      Integer x = 5,y = 10,z = 0; 
		
      // The the values of 5,10 and 0 are boxed into Integer types 
      // The values of x and y are unboxed and the addition is performed 
      z = x+y; 
      println(z);
   }
}