abc.java

/**
 * User object contains user ID as an integer, and 5 fields of generic object
 * In this example, 5 fields of generic objects are associate with some primitive types
 */
static class User {

   // userID is a number
   private Integer userID;

   // generic type of float number
   private Float field1;

   // generic type of integer number
   private Short field2;

   // generic type of boolean number
   private Boolean field3;

   // generic type of byte number
   private Byte field4;

   // generic type of long number
   private Long field5;

}