** ENUM Example 
==== ENUM_Season.java =====
public enum ENUM_Season {
 SPRING, SUMMER, FALL, WINTER
}
==== ENUM_Season01_A.java ===
public class ENUM_Season01_A {
 public static void main(String[] args)  {
  ENUM_Season season = ENUM_Season.SUMMER;
  System.out.println(season);
  if (season.equals(ENUM_Season.SPRING) == true) {
   System.out.println("the current season is SPRING.");
  }else {
   System.out.println("the current season is not SPRING.");
  }
 }
}
===== Output ===
SUMMER
the current season is not SPRING.
Monday, 15 October 2007
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