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Equals and = operator for enum data type

enum Week {   Monday, Tuesday, Wednesday, Thursday, Friday, Saturaday, Sunday } public class MainClass {   public static void main(String args[]) {     Week day1, day2, day3;     day1 = Week.Monday;     day2 = Week.Monday;     day3 = Week.Monday;     if(day1.equals(day2))       System.out.println("Error!");     if(day1.equals(day3))       System.out.println(day1 + " equals " + day3);     if(day2 == day3)       System.out.println(day2 + " == " + day3);   } } Error! Monday equals Monday Monday == Monday