The parameter to the method is the basic data type

 package method.invocation;

 public class TheParameterToTheMethodIsTheBasicDataType {
     public static void main(String[] args) {
         int a = 10;
         int b = 20;

         System.out.println(a+" "+b);

         change(a, b);

         System.out.println(a+" "+b);
     }

     public static void change(int a, int b) {
         System.out.println(a+" "+b);
         a = b;
         b = a + b;
         System.out.println(a+" "+b);
     }
 }